(2R,4aR,10bR)-7-Benzyloxycarbonylamino-1,2,3,4,4a,5,6,10b-octahydro-6-oxobenzo
chinolin-2-carbonsaeure 、 (2R,5S,10aS,10bS)-2-Amino-5-benzyl-10b-hydroxy-2-methyl-tetrahydro-oxazolo[3,2-a]pyrrolo[2,1-c]pyrazine-3,6-dione; hydrochloride 在
草酸氯化物 作用下,
生成 [(2R,4aR,10bR)-2-((2R,5S,10aS,10bS)-5-Benzyl-10b-hydroxy-2-methyl-3,6-dioxo-octahydro-oxazolo[3,2-a]pyrrolo[2,1-c]pyrazin-2-ylcarbamoyl)-4-methyl-6-oxo-1,2,3,4,4a,5,6,10b-octahydro-benzo[f]quinolin-7-yl]-carbamic acid benzyl ester