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(R)-7-cyano-18-(2,4-difluorophenyl)-10,13,14,16,17,18-hexahydro-15,2-(azeno)-8,4-(metheno)cyciopenta[h][1,6,10,12]oxatriazacycloheptadecine
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(S)-7-cyano-18-(2,4-difluorophenyl)-10,13,14,16,17,18-hexahydro-15,2-(azeno)-8,4-(metheno)cyciopenta[h][1,6,10,12]oxatriazacycloheptadecine