英文别名
methyl (4R,5S,8R)-8-(t-butyl)-7-methyl-2-oxo-4-phenyl-3-oxa-1,7-diazabicyclo<3.3.0>octane-5-carboxylate;methyl (4R,5S,8R)-8-(t-butyl)-7-methyl-2-oxo-4-phenyl-3-oxa-1,7-diazabicyclo[3.3.0]octane-5-carboxylate;methyl (1R,5R,7aS)-5-tert-butyl-6-methyl-3-oxo-1-phenyl-5,7-dihydro-1H-imidazo[1,5-c][1,3]oxazole-7a-carboxylate