乙酸酐 、 (1
S)-6-hydroxy-1-((1
S,2
S)-2-hydroxy-2-methyl-1,3-(Ξ,Ξ)-bis-tetrahydropyran-2-yloxy-propyl)-5-methylene-2-oxa-7,9-diaza-bicyclo[4.2.2]decane-8,10-dione 生成
(1S)-6-acetoxy-5-methylene-1-((1S,2S)-1,2,3-trihydroxy-2-methyl-propyl)-2-oxa-7,9-diaza-bicyclo[4.2.2]decane-8,10-dione