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Periodic Table/Compounds/Penicillin X

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© Melvin Olsson 2025–2026
Data: IAEA & PubChem

Penicillin X

C₁₆H₁₈N₂O₅S·350.400 g/mol·CID 120720

IUPAC: (2S,5R,6R)-6-[[2-(4-hydroxyphenyl)acetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid

Also known as: Penicillin III, 525-91-7, p-Hydroxybenzylpenicillin, 4-hydroxybenzylpenicillin, W097A2S1DU (+14 more)

2D structure of Penicillin X

Molecular Structure

Molecular Propertiesmass · H-bonds · stereo

Molecular Weight

350.400g/mol

Exact Mass

350.093643Da

Monoisotopic Mass

350.093643Da

XLogP

1.5

Polar Surface Area

132.0Ų

Complexity

559

Formal Charge

0

H-Bond Donors

3

H-Bond Acceptors

6

Rotatable Bonds

4

Heavy Atoms

24

Stereo Centers

3

Bond Stereo

0

Drug-Likeness (Lipinski's Rule of Five)

✓ 350.4 g/mol
MW ≤ 500
✓ 1.5
LogP ≤ 5
✓ 3
H-bond donors ≤ 5
✓ 6
H-bond acceptors ≤ 10

Passes all rules — good oral bioavailability predicted

GHS Hazard Classification

Danger
Health Hazard
Health Hazard
Hazards
  • H317May cause an allergic skin reaction
  • H334May cause allergy or asthma symptoms or breathing difficulties if inhaled

Source: PubChem GHS Classification. Always consult the SDS for handling.

Chemical IdentifiersSMILES · InChI

InChI

InChI=1S/C16H18N2O5S/c1-16(2)12(15(22)23)18-13(21)11(14(18)24-16)17-10(20)7-8-3-5-9(19)6-4-8/h3-6,11-12,14,19H,7H2,1-2H3,(H,17,20)(H,22,23)/t11-,12+,14-/m1/s1

Isomers8 compounds with formula C₁₆H₁₈N₂O₅S

2D structure of (2S,5R,6R)-3,3-dimethyl-7-oxo-6-[(2-phenoxyacetyl)amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid

(2S,5R,6R)-3,3-dimethyl-7-oxo-6-[(2-phenoxyacetyl)amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid

CID 6869 · 350.4 g/mol

2D structure of 3,3-dimethyl-7-oxo-6-[(2-phenoxyacetyl)amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid

3,3-dimethyl-7-oxo-6-[(2-phenoxyacetyl)amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid

CID 4731 · 350.4 g/mol

2D structure of N-hydroxy-2-[2-hydroxyethyl-(4-phenylphenyl)sulfonylamino]acetamide

N-hydroxy-2-[2-hydroxyethyl-(4-phenylphenyl)sulfonylamino]acetamide

CID 24178109 · 350.4 g/mol

2D structure of 2-[benzyl-(4-methoxyphenyl)sulfonylamino]-N-hydroxyacetamide

2-[benzyl-(4-methoxyphenyl)sulfonylamino]-N-hydroxyacetamide

CID 10594000 · 350.4 g/mol

2D structure of 2-amino-N-hydroxy-2-methyl-3-(4-phenoxyphenyl)sulfonylpropanamide

2-amino-N-hydroxy-2-methyl-3-(4-phenoxyphenyl)sulfonylpropanamide

CID 9841323 · 350.4 g/mol

2D structure of N-(2-cyanoethyl)-N-(furan-2-ylmethyl)-3,4-dimethoxybenzenesulfonamide

N-(2-cyanoethyl)-N-(furan-2-ylmethyl)-3,4-dimethoxybenzenesulfonamide

CID 2800759 · 350.4 g/mol

2D structure of 2-(4-ethoxyphenoxy)-N-(4-sulfamoylphenyl)acetamide

2-(4-ethoxyphenoxy)-N-(4-sulfamoylphenyl)acetamide

CID 1193007 · 350.4 g/mol

2D structure of N-[(E)-(2,3,5-trimethoxyphenyl)methylideneamino]benzenesulfonamide

N-[(E)-(2,3,5-trimethoxyphenyl)methylideneamino]benzenesulfonamide

CID 5348459 · 350.4 g/mol

External Resources

PubChem ↗Wikipedia ↗