Identification of the active metabolites of the isoxazolylpenicillins by means of mass-spectrometry.

1 January 1979

journal article
research article
Published by Japan Antibiotics Research Association in The Journal of Antibiotics

Vol. 32 (10) , 1033-1037
https://doi.org/10.7164/antibiotics.32.1033

Abstract

Electron-impact mass-spectrometry of the methyl esters of the isoxazolylpenicillins and of their active metabolites showed the latter to be formed from their parent compounds by hydroxylation of the 5-methyl group.