[S-(R',R')]-2,3-Bis(benzoyloxy)butanedioic acid compd. with [S-(R',R')]-[1-ethyl-2-(phenylmethoxy)pr
2-[(1S,2S)-1-Ethyl-2-bezyloxypropyl]-2,4-dihydro-4-[4-[4-(4-hydroxyphenyl)-1-piperazinyl]phenyl]-3H-