EOS1830

Name:
EOS:	EOS1830
CAS:
Synonyms:
Tags:
Compound Library:	European Chemical Biology Library ECBL Pilot Compounds Representative set of the diversity library

Basic Properties:

Formula:	C18H15N3O3
Molecular Weight:	321.34
Rotatable Bond Donors:	3
clogP:	2.88
Topological Polar Surface Area:	69.14
Lipinski's RO5:	MW: 321.34 HBA: 6 HBD: 1 RB: 3 LogP: 2.88
Rule of Three:	MW: 321.34 HBA: 6 HBD: 1 RB: 3 LogP: 2.88

Additional Data:

Other Descriptors

Feature	Value
FP3 Fingerprint:	0.11
NHs/OHs:	1
Nitrogens and Oxygens:	6
Aliphatic Carbocycles:	0
Aliphatic Heterocycles:	0
Aliphatic Rings:	0
Aromatic Carbocycles:	2
Aromatic Heterocycles:	2
Aromatic Rings:	4
Heteroatoms:	6
Radical Electrons:	0
Saturated Carbocycles:	0
Saturated Heterocycles:	0
Saturated Rings:	0
Valence Electrons:	120
Rings:	4
Aliphatic Carboxylic Acids:	0
Aliphatic Hydroxyl Groups:	0
Aliphatic Hydroxyl Groups Excluding Tert-OH:	0
Nitrogen Functional Groups Attached to Aromatics:	0
Aromatic Carboxylic Acide:	0
Aromatic Nitrogens:	3
Aromatic Amines:	1
Aromatic Hydroxyl Groups:	0
Carboxylic Acids (COO):	0
Carboxylic Acids (COO2):	0
Carbonyl Oxygens:	0
Carbonyl Oxygens, excluding COOH:	0
Thiocarbonyls:	0
C(OH)CCN-Ctert-alkyls/C(OH)CCNcyclics:	0
Imines:	0
Tertiary Amines:	2
Secondary Amines:	1
Primary Amines:	0
Hydroxylamine Groups:	0
XCCNR Groups:	0
Tert-alicyclic Amines (no heteroatoms, not quinine-like bridged N):	0
H-pyrrole nitrogens:	1
Thiol groups:	0
Aldehydes:	0
Alkyl Carbamates (subject to hydrolysis):	0
Alkyl Halides:	0
Allylic Oxidation Sites excluding Steroid Dienone:	0
Amides:	0
Amidine Groups:	0
Anilines:	0
Aryl Methyl Sites for Hydroxylation:	0
Azide Groups:	0
Azo Groups:	0
Barbiturate Groups:	0
Benzene Rings:	2
Benzodiazepines with no additional Fused Rings:	0
Bicyclic:	3
Diazo Groups:	0
Dihydropyridines:	0
Epoxide Rings:	0
Esters:	0
Ether Oxygens (including phenoxy):	2
Furan Rings:	0
Guanidine Groups:	0
Halogens:	0
Hydrazine Groups:	0
Hydrazone Groups:	0
Imidazole Rings:	0
Imide Groups:	0
Isocyanates:	0
Isothiocyanates:	0
Ketones:	0
Ketones excluding diaryl, a,b-unsat. dienones, heteroatom on Calpha:	0
Beta Lactams:	0
Cyclic Esters (Lactones):	0
Methoxy Groups -OCH3:	2
Morpholine Rings:	0
Nitriles:	0
Nitro Groups:	0
Nitro Benzene Ring Substituents:	0
Non-ortho Nitro Benzene Ring Substituents:	0
Nitroso Groups, excluding NO2:	0
Oxazole Rings:	0
Oxime Groups:	0
Para-hydroxylation Sites:	1
Phenols:	0
Phenolic OH excluding Ortho Intramolecular Hbond substituents:	0
Phosphoric Acid Groups:	0
Phosphoric Ester Groups:	0
Piperdine Rings:	0
Piperzine Rings:	0
Primary Amides:	0
Primary Sulfonamides:	0
Pyridine Rings:	1
Guarternary Nitrogens:	0
Thioethers:	0
Sulfonamides:	0
Sulfone Groups:	0
Terminal Acetylenes:	0
Tetrazole Rings:	0
Thiazole Rings:	0
Thiocyanates:	0
Thiophene Rings:	0
Unbranched Alkanes of at least 4 members (excludes halogenated alkanes):	0
Urea Groups:	0
BCUT2D - Gasteiger Charge Eigenvalue High:	2.15
BCUT2D - Gasteiger Charge Eigenvalue Low:	-2.08
BCUT2D - Crippen Lowgp Eigenvalue High:	2.32
BCUT2D - Crippen Lowgp Eigenvalue Low:	-2.13
BCUT2D - Crippen MR Eigenvalue High:	6.05
BCUT2D - Crippen MR Eigenvalue Low:	0.40
BCUT2D - Mass Eigenvalue High:	16.48
BCUT2D - Mass Eigenvalue Low:	10.13
Balaban’s J:	2.10
Bertz CT:	1097.35
Chi 0:	16.68
Chi 0n:	13.24
Chi 0v:	13.24
Chi 1:	11.72
Chi 1n:	7.44
Chi 1v:	7.44
Chi 2n:	5.36
Chi 2v:	5.36
Chi 3v:	4.04
Chi 3v:	4.04
Chi 4n:	2.84
Chi 4v:	2.84
Morgan Fingerprint Density (1):	1.04
Morgan Fingerprint Density (2):	1.83
Morgan Fingerprint Density (3):	2.54
CSP3 Fraction:	0.11
Hall Kier Alpha:	-3.28
Heavy Atoms:	24.00
Ipc descriptor:	566219.80
Kappa 1:	14.32
Kappa 2:	5.42
Kappa 3:	2.04
Labute ASA:	136.80
Max ABS Estate Index:	12.71
Max ABS Partial Charge:	0.50
Max Estate Index:	12.71
Max Partial Charge:	0.28
Minimal ABS Estate Index:	0.15
Minimal ABS Partial Charge:	0.28
Minimal State Index:	-0.15
Minimal Partial Charge:	-0.50
Molar Refractivity:	92.30
Quantitative Estimation of Drug-likeness (QED):	0.63

External Databases

DB
eMolecules (30309717)
PubChem (45588945)
Mcule (MCULE-6131198656)
MolPort (MolPort-008-010-591)
ZINC (ZINC000040227516)

Structure formats:

Smiles

InChI

SDF

EOS1830
     RDKit          3D

24 27  0  0  0  0  0  0  0  0999 V2000
   -4.2252    2.1069   -0.4711 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.6516    0.9359    0.2169 O   0  0  0  0  0  0  0  0  0  0  0  0
   -3.5973    0.1244    0.5203 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.8973   -1.0511    1.1945 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.8892   -1.9548    1.5538 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.1694   -3.1257    2.2229 O   0  0  0  0  0  0  0  0  0  0  0  0
   -4.5607   -3.2718    2.4806 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.5431   -1.7024    1.2444 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.5497   -2.5731    1.5877 N   0  0  0  0  0  0  0  0  0  0  0  0
    0.7378   -2.2961    1.2725 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.0472   -1.1473    0.6115 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.3136   -0.6099    0.1583 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.3801   -1.1704    0.3244 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.0034    0.5967   -0.4543 N   0  0  0  0  0  0  0  0  0  0  0  0
    2.8731    1.5145   -1.0624 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.3783    2.6895   -1.6343 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.2390    3.6032   -2.2389 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.6066    3.3481   -2.2766 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.1113    2.1813   -1.7104 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.2466    1.2705   -1.1069 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.6076    0.8777   -0.4270 N   0  0  0  0  0  0  0  0  0  0  0  0
    0.0705   -0.2434    0.2482 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.2570   -0.4993    0.5571 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.2743    0.3966    0.2032 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0
  2  3  1  0
  3  4  2  0
  4  5  1  0
  5  6  1  0
  6  7  1  0
  5  8  2  0
  8  9  1  0
  9 10  2  0
 10 11  1  0
 11 12  1  0
 12 13  2  0
 12 14  1  0
 14 15  1  0
 15 16  2  0
 16 17  1  0
 17 18  2  0
 18 19  1  0
 19 20  2  0
 14 21  1  0
 21 22  1  0
 22 23  1  0
 23 24  2  0
 24  3  1  0
 23  8  1  0
 22 11  2  0
 20 15  1  0
M  END

$$$$

Similar ECBD compounds (0 entries):

	ECBD ID	Similarity	Structure	SDF

Similar ZINC compounds (5 entries):

ZINC ID	Similarity	SDF
ZINC40227516	1.0	ZINC40227516 RDKit 3D 24 27 0 0 0 0 0 0 0 0999 V2000 -2.4249 1.7692 3.6929 C 0 0 0 0 0 0 0 0 0 0 0 0 -3.5139 1.2607 2.9300 O 0 0 0 0 0 0 0 0 0 0 0 0 -3.0832 0.6773 1.7740 C 0 0 0 0 0 0 0 0 0 0 0 0 -4.0639 0.1450 0.9487 C 0 0 0 0 0 0 0 0 0 0 0 0 -3.7300 -0.4763 -0.2615 C 0 0 0 0 0 0 0 0 0 0 0 0 -4.6906 -1.0097 -1.0922 O 0 0 0 0 0 0 0 0 0 0 0 0 -6.0015 -0.8441 -0.5655 C 0 0 0 0 0 0 0 0 0 0 0 0 -2.3940 -0.5813 -0.6800 C 0 0 0 0 0 0 0 0 0 0 0 0 -2.0528 -1.1836 -1.8562 N 0 0 0 0 0 0 0 0 0 0 0 0 -0.7531 -1.2664 -2.2273 C 0 0 0 0 0 0 0 0 0 0 0 0 0.2195 -0.7489 -1.4283 C 0 0 0 0 0 0 0 0 0 0 0 0 1.6596 -0.6988 -1.5759 C 0 0 0 0 0 0 0 0 0 0 0 0 2.2542 -1.1596 -2.5315 O 0 0 0 0 0 0 0 0 0 0 0 0 2.1234 -0.0465 -0.4414 N 0 0 0 0 0 0 0 0 0 0 0 0 3.4472 0.2604 -0.0924 C 0 0 0 0 0 0 0 0 0 0 0 0 3.7296 0.9285 1.1019 C 0 0 0 0 0 0 0 0 0 0 0 0 5.0431 1.2349 1.4517 C 0 0 0 0 0 0 0 0 0 0 0 0 6.0884 0.8742 0.6068 C 0 0 0 0 0 0 0 0 0 0 0 0 5.8197 0.2085 -0.5854 C 0 0 0 0 0 0 0 0 0 0 0 0 4.5046 -0.0958 -0.9309 C 0 0 0 0 0 0 0 0 0 0 0 0 1.0691 0.3319 0.4379 N 0 0 0 0 0 0 0 0 0 0 0 0 -0.0866 -0.1329 -0.2326 C 0 0 0 0 0 0 0 0 0 0 0 0 -1.4086 -0.0328 0.1744 C 0 0 0 0 0 0 0 0 0 0 0 0 -1.7553 0.5861 1.3825 C 0 0 0 0 0 0 0 0 0 0 0 0 1 2 1 0 2 3 1 0 3 4 2 0 4 5 1 0 5 6 1 0 6 7 1 0 5 8 2 0 8 9 1 0 9 10 2 0 10 11 1 0 11 12 1 0 12 13 2 0 12 14 1 0 14 15 1 0 15 16 2 0 16 17 1 0 17 18 2 0 18 19 1 0 19 20 2 0 14 21 1 0 21 22 1 0 22 23 1 0 23 24 2 0 24 3 1 0 23 8 1 0 22 11 2 0 20 15 1 0 M END $$$$
ZINC64873617	0.7	ZINC64873617 RDKit 3D 24 27 0 0 0 0 0 0 0 0999 V2000 -6.1875 0.3792 -0.7521 C 0 0 0 0 0 0 0 0 0 0 0 0 -5.4651 -0.4966 0.1055 O 0 0 0 0 0 0 0 0 0 0 0 0 -4.1124 -0.2854 0.0262 C 0 0 0 0 0 0 0 0 0 0 0 0 -3.5446 0.6837 -0.8085 C 0 0 0 0 0 0 0 0 0 0 0 0 -2.1763 0.8939 -0.8855 C 0 0 0 0 0 0 0 0 0 0 0 0 -1.6833 1.8481 -1.7129 N 0 0 0 0 0 0 0 0 0 0 0 0 -0.3424 2.0403 -1.7759 C 0 0 0 0 0 0 0 0 0 0 0 0 0.4980 1.2822 -1.0157 C 0 0 0 0 0 0 0 0 0 0 0 0 1.9411 1.2779 -0.8912 C 0 0 0 0 0 0 0 0 0 0 0 0 2.6701 2.0273 -1.5125 O 0 0 0 0 0 0 0 0 0 0 0 0 2.2280 0.2853 0.0362 N 0 0 0 0 0 0 0 0 0 0 0 0 3.4817 -0.1248 0.5142 C 0 0 0 0 0 0 0 0 0 0 0 0 4.6511 0.4848 0.0570 C 0 0 0 0 0 0 0 0 0 0 0 0 5.8969 0.0785 0.5308 C 0 0 0 0 0 0 0 0 0 0 0 0 5.9828 -0.9451 1.4697 C 0 0 0 0 0 0 0 0 0 0 0 0 4.8244 -1.5611 1.9337 C 0 0 0 0 0 0 0 0 0 0 0 0 3.5809 -1.1514 1.4569 C 0 0 0 0 0 0 0 0 0 0 0 0 1.0552 -0.3590 0.5247 N 0 0 0 0 0 0 0 0 0 0 0 0 0.0169 0.3056 -0.1669 C 0 0 0 0 0 0 0 0 0 0 0 0 -1.3493 0.0844 -0.0797 C 0 0 0 0 0 0 0 0 0 0 0 0 -1.9029 -0.8903 0.7613 C 0 0 0 0 0 0 0 0 0 0 0 0 -3.2817 -1.0819 0.8206 C 0 0 0 0 0 0 0 0 0 0 0 0 -3.8708 -2.0202 1.6255 O 0 0 0 0 0 0 0 0 0 0 0 0 -2.9110 -2.7553 2.3747 C 0 0 0 0 0 0 0 0 0 0 0 0 1 2 1 0 2 3 1 0 3 4 2 0 4 5 1 0 5 6 2 0 6 7 1 0 7 8 2 0 8 9 1 0 9 10 2 0 9 11 1 0 11 12 1 0 12 13 2 0 13 14 1 0 14 15 2 0 15 16 1 0 16 17 2 0 11 18 1 0 18 19 1 0 19 20 2 0 20 21 1 0 21 22 2 0 22 23 1 0 23 24 1 0 22 3 1 0 20 5 1 0 19 8 1 0 17 12 1 0 M END $$$$
ZINC34150800	0.7	ZINC34150800 RDKit 3D 22 25 0 0 0 0 0 0 0 0999 V2000 1.3509 -2.8939 -0.6759 O 0 0 0 0 0 0 0 0 0 0 0 0 0.9647 -1.7557 -0.4922 C 0 0 0 0 0 0 0 0 0 0 0 0 -0.4325 -1.3994 -0.3528 C 0 0 0 0 0 0 0 0 0 0 0 0 -1.5655 -2.1547 -0.3856 C 0 0 0 0 0 0 0 0 0 0 0 0 -2.7785 -1.5705 -0.2262 N 0 0 0 0 0 0 0 0 0 0 0 0 -2.8627 -0.2255 -0.0330 C 0 0 0 0 0 0 0 0 0 0 0 0 -4.0952 0.4120 0.1351 C 0 0 0 0 0 0 0 0 0 0 0 0 -5.2255 -0.3130 0.1064 F 0 0 0 0 0 0 0 0 0 0 0 0 -4.2114 1.7867 0.3344 C 0 0 0 0 0 0 0 0 0 0 0 0 -3.0627 2.5590 0.3686 C 0 0 0 0 0 0 0 0 0 0 0 0 -3.1567 3.8807 0.5591 F 0 0 0 0 0 0 0 0 0 0 0 0 -1.8137 1.9773 0.2072 C 0 0 0 0 0 0 0 0 0 0 0 0 -1.7107 0.5937 0.0075 C 0 0 0 0 0 0 0 0 0 0 0 0 -0.4845 -0.0339 -0.1588 C 0 0 0 0 0 0 0 0 0 0 0 0 0.8020 0.5531 -0.1594 N 0 0 0 0 0 0 0 0 0 0 0 0 1.6628 -0.5621 -0.3703 N 0 0 0 0 0 0 0 0 0 0 0 0 3.0489 -0.3531 -0.4301 C 0 0 0 0 0 0 0 0 0 0 0 0 3.5802 0.9311 -0.2849 C 0 0 0 0 0 0 0 0 0 0 0 0 4.9562 1.1420 -0.3437 C 0 0 0 0 0 0 0 0 0 0 0 0 5.8150 0.0665 -0.5490 C 0 0 0 0 0 0 0 0 0 0 0 0 5.2978 -1.2172 -0.6950 C 0 0 0 0 0 0 0 0 0 0 0 0 3.9210 -1.4233 -0.6355 C 0 0 0 0 0 0 0 0 0 0 0 0 1 2 2 0 2 3 1 0 3 4 2 0 4 5 1 0 5 6 2 0 6 7 1 0 7 8 1 0 7 9 2 0 9 10 1 0 10 11 1 0 10 12 2 0 12 13 1 0 13 14 2 0 14 15 1 0 15 16 1 0 16 17 1 0 17 18 2 0 18 19 1 0 19 20 2 0 20 21 1 0 21 22 2 0 16 2 1 0 22 17 1 0 14 3 1 0 13 6 1 0 M END $$$$
ZINC64874758	0.71	ZINC64874758 RDKit 3D 22 25 0 0 0 0 0 0 0 0999 V2000 -4.9393 -1.4888 1.6486 C 0 0 0 0 0 0 0 0 0 0 0 0 -4.0097 -0.7699 0.7261 C 0 0 0 0 0 0 0 0 0 0 0 0 -4.5638 -0.0783 -0.3552 C 0 0 0 0 0 0 0 0 0 0 0 0 -3.7354 0.6017 -1.2347 C 0 0 0 0 0 0 0 0 0 0 0 0 -4.2655 1.2641 -2.2704 F 0 0 0 0 0 0 0 0 0 0 0 0 -2.3621 0.6008 -1.0497 C 0 0 0 0 0 0 0 0 0 0 0 0 -1.8108 -0.0934 0.0353 C 0 0 0 0 0 0 0 0 0 0 0 0 -2.6336 -0.7962 0.9486 C 0 0 0 0 0 0 0 0 0 0 0 0 -2.1192 -1.4747 2.0056 N 0 0 0 0 0 0 0 0 0 0 0 0 -0.7778 -1.4877 2.2041 C 0 0 0 0 0 0 0 0 0 0 0 0 0.0502 -0.8246 1.3491 C 0 0 0 0 0 0 0 0 0 0 0 0 1.4909 -0.6774 1.3276 C 0 0 0 0 0 0 0 0 0 0 0 0 2.2283 -1.1778 2.1551 O 0 0 0 0 0 0 0 0 0 0 0 0 1.7641 0.1100 0.2175 N 0 0 0 0 0 0 0 0 0 0 0 0 3.0102 0.5488 -0.2547 C 0 0 0 0 0 0 0 0 0 0 0 0 4.1860 0.1995 0.4113 C 0 0 0 0 0 0 0 0 0 0 0 0 5.4243 0.6346 -0.0566 C 0 0 0 0 0 0 0 0 0 0 0 0 5.4962 1.4258 -1.1992 C 0 0 0 0 0 0 0 0 0 0 0 0 4.3312 1.7810 -1.8725 C 0 0 0 0 0 0 0 0 0 0 0 0 3.0953 1.3436 -1.4009 C 0 0 0 0 0 0 0 0 0 0 0 0 0.5843 0.4853 -0.4870 N 0 0 0 0 0 0 0 0 0 0 0 0 -0.4439 -0.1265 0.2663 C 0 0 0 0 0 0 0 0 0 0 0 0 1 2 1 0 2 3 2 0 3 4 1 0 4 5 1 0 4 6 2 0 6 7 1 0 7 8 2 0 8 9 1 0 9 10 2 0 10 11 1 0 11 12 1 0 12 13 2 0 12 14 1 0 14 15 1 0 15 16 2 0 16 17 1 0 17 18 2 0 18 19 1 0 19 20 2 0 14 21 1 0 21 22 1 0 8 2 1 0 22 11 2 0 22 7 1 0 20 15 1 0 M END $$$$
ZINC64874662	0.82	ZINC64874662 RDKit 3D 23 26 0 0 0 0 0 0 0 0999 V2000 -2.3278 -1.0311 -5.5592 C 0 0 0 0 0 0 0 0 0 0 0 0 -1.2225 -0.9407 -4.6693 O 0 0 0 0 0 0 0 0 0 0 0 0 -1.6143 -0.6151 -3.3896 C 0 0 0 0 0 0 0 0 0 0 0 0 -2.9602 -0.4084 -3.0604 C 0 0 0 0 0 0 0 0 0 0 0 0 -3.3330 -0.0811 -1.7648 C 0 0 0 0 0 0 0 0 0 0 0 0 -4.7644 0.1361 -1.4263 C 0 0 0 0 0 0 0 0 0 0 0 0 -2.3554 0.0411 -0.7894 C 0 0 0 0 0 0 0 0 0 0 0 0 -1.0064 -0.1634 -1.1077 C 0 0 0 0 0 0 0 0 0 0 0 0 -0.6028 -0.4980 -2.4225 C 0 0 0 0 0 0 0 0 0 0 0 0 0.7126 -0.6967 -2.7296 N 0 0 0 0 0 0 0 0 0 0 0 0 1.6604 -0.5752 -1.7704 C 0 0 0 0 0 0 0 0 0 0 0 0 1.3063 -0.2544 -0.4960 C 0 0 0 0 0 0 0 0 0 0 0 0 2.0977 -0.0639 0.7021 C 0 0 0 0 0 0 0 0 0 0 0 0 3.3084 -0.1763 0.7335 O 0 0 0 0 0 0 0 0 0 0 0 0 1.1852 0.2500 1.7001 N 0 0 0 0 0 0 0 0 0 0 0 0 1.4336 0.5287 3.0524 C 0 0 0 0 0 0 0 0 0 0 0 0 0.3804 0.8274 3.9208 C 0 0 0 0 0 0 0 0 0 0 0 0 0.6236 1.1047 5.2644 C 0 0 0 0 0 0 0 0 0 0 0 0 1.9268 1.0854 5.7521 C 0 0 0 0 0 0 0 0 0 0 0 0 2.9841 0.7893 4.8970 C 0 0 0 0 0 0 0 0 0 0 0 0 2.7360 0.5127 3.5541 C 0 0 0 0 0 0 0 0 0 0 0 0 -0.1561 0.2752 1.2222 N 0 0 0 0 0 0 0 0 0 0 0 0 -0.0121 -0.0463 -0.1480 C 0 0 0 0 0 0 0 0 0 0 0 0 1 2 1 0 2 3 1 0 3 4 2 0 4 5 1 0 5 6 1 0 5 7 2 0 7 8 1 0 8 9 2 0 9 10 1 0 10 11 2 0 11 12 1 0 12 13 1 0 13 14 2 0 13 15 1 0 15 16 1 0 16 17 2 0 17 18 1 0 18 19 2 0 19 20 1 0 20 21 2 0 15 22 1 0 22 23 1 0 9 3 1 0 23 12 2 0 23 8 1 0 21 16 1 0 M END $$$$

Assays:

Name	Assay stage	Target	Activity

Sections: