δ-(L-α-aminoadipyl)-L-cysteinyl-D-3,4-didehydrovaline 在
isopenicillin-N synthase 、
氧气 作用下,
生成 (2R,6R,7R)-7-((S)-5-Amino-5-carboxy-pentanoylamino)-3-methylene-8-oxo-5-thia-1-aza-bicyclo[4.2.0]octane-2-carboxylic acid 、 (2S,3S,5R,6R)-6-((S)-5-Amino-5-carboxy-pentanoylamino)-3-hydroxymethyl-3-methyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid