[(1R,13R,15R,16S)-15-cyano-5-hydroxy-22-(methoxymethoxy)-6,20,21,24-tetramethyl-8,10-dioxa-14,24-diazahexacyclo[14.7.1.02,14.04,12.07,11.018,23]tetracosa-4(12),5,7(11),18(23),19,21-hexaen-13-yl]methyl (2S)-3-(9H-fluoren-9-ylmethylsulfanyl)-2-methylpropanoate;[(1R,13R,15R,16S)-15-cyano-22-(methoxymethoxy)-6,20,21,24-tetramethyl-5-prop-2-enoxy-8,10-dioxa-14,24-diazahexacyclo[14.7.1.02,14.04,12.07,11.018,23]tetracosa-4,6,11,18(23),19,21-hexaen-13-yl]methyl (2S)-3-(9H-fluoren-9-ylmethylsulfanyl)-2-methylpropanoate