(4R,5R,9R,12S)-11,11-dimethyl-3,6,14-trioxo-4-[(2-phenylacetyl)amino]-6λ4,10-dithia-2,13-diazatetracyclo[6.6.0.02,5.09,13]tetradec-1(8)-ene-12-carboxylic acid 生成 benzhydryl (4R,5R,9R,12S)-11,11-dimethyl-3,6,14-trioxo-4-[(2-phenylacetyl)amino]-6λ4,10-dithia-2,13-diazatetracyclo[6.6.0.02,5.09,13]tetradec-1(8)-ene-12-carboxylate