Penicillin S
Title: Penicillin S
CAS Registry Number: 575-54-2
CAS Name: (2S,5R,6R)-6-[[[(3-Chloro-2-butenyl)thio]acetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
Additional Names: g-chlorocrotylmercaptomethylpenicillin
Molecular Formula: C14H19ClN2O4S2
Molecular Weight: 378.89
Percent Composition: C 44.38%, H 5.05%, Cl 9.36%, N 7.39%, O 16.89%, S 16.93%
Literature References: Obtained by growing a penicillin-producing mold in a culture medium contg g-chlorocrotylmercaptoacetic acid: Ford et al., J. Am. Chem. Soc. 70, 3522 (1948); Ford et al., Antibiot. Chemother. 3, 1149 (1953).
 
Derivative Type: Potassium salt
CAS Registry Number: 525-87-1
Additional Names: Potassium g-chlorocrotylmercaptomethylpenicillinate; potassium penicillin S
Molecular Formula: C14H18ClKN2O4S2
Molecular Weight: 416.99
Percent Composition: C 40.32%, H 4.35%, Cl 8.50%, K 9.38%, N 6.72%, O 15.35%, S 15.38%
Properties: Crystals from acetone. Disagreeable odor and taste. Sol in water. Bioassay: 1900 units/mg.
 
 
Status: This monograph has been retired and is no longer subject to revision or update.

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