(S)-4-[(1R)1-Hydroxy-2-[[1-[3-(1-methylethyl)phenyl]cyclopropyl]amino]ethyl]-19-methyl-11,16-dioxa-3,18-diazatricyclo[15.3.1.16,10]docSa-1(21),6,8,10(22),17,19-hexaen-2-one; (S)-4-[(1R)-1-Hydroxy-2-[[1-(3-Sopropylphenyl)cyclopropyl]amino]ethyl]-19-methyl-11,16-dioxa-3,18-diazatricyclo[15.3.1.16,10]docSa-1(21),6,8,10(22),17,19-hexaen-2-one;