75323-62-5

2R-(2?,5?,10A?,10B?)]-OCTAHYDRO-10B-HYDROXY-2-METHYL-3,6,8-TRIOXO-5-(PHENYLMETHYL)-8H-OXAZOLO[3,2-A]PYRROLO[2,1-C]PYRAZINE-2-CARBOXYLIC ACID ETHYL ESTER