1 VHC 4-amino-20,22-dimethyl-13-oxa-7-thia-3,5,17-triazatetracyclo[17.3.1.1~2,6~.1~8,12~]pentacosa-1(23),2(25),3,5,8(24),9,11,19,21-nonaen-18-one 1.000 2 VHA 22-methyl-13,18-dioxa-7-thia-3,5-diazatetracyclo[17.3.1.1~2,6~.1~8,12~]pentacosa-1(23),2(25),3,5,8(24),9,11,19,21-nonaen-4-amine 0.806