title: [Studies on sultamicillin hydrolysis].
abstract: Sultamicillin is an oral mutual pro-drug composed of double esters of formaldehyde hydrate in which one of the hydroxyl groups is esterified with ampicillin and the other with sulbactam. It is hydrolyzed fast in neutral or weakly alkaline condition. When hydrolyzed, it forms ampicillin and hydroxylmethyl sulbactam or sulbactam and hydroxylmethyl ampicillin by different routes. Usually, the former has priority as the two ester bonds have different activities. The ratio of ampicillin to sulbactam in the products is about 3:1. Both the hydroxylmethyl sulbactam and the hydroxylmethyl ampicillin can be further catalyzed by esterase to produce formaldehyde.
authors.affiliation: National Institute for the Control of Pharmaceutical and Biological Products, Beijing 100050.
authors.forename: C Q
authors.initials: CQ
authors.lastname: Hu
authors.forename: M Z
authors.initials: MZ
authors.lastname: Yang
authors.forename: D C
authors.initials: DC
authors.lastname: Zhang
authors.forename: W
authors.initials: W
authors.lastname: Liu
authors.forename: Q
authors.initials: Q
authors.lastname: Wu
authors.forename: H
authors.initials: H
authors.lastname: Liang
authors.forename: S H
authors.initials: SH
authors.lastname: Jin
mesh_terms: D000667:Ampicillin / Q000032:analysis / Q000737:chemistry*; D004359:Drug Therapy, Combination; D006868:Hydrolysis; D011355:Prodrugs / Q000737:chemistry*; D013407:Sulbactam / Q000032:analysis / Q000737:chemistry*
chemical_list: D011355:Prodrugs; C035444:sultamicillin; D000667:Ampicillin; D013407:Sulbactam