V6D v6d (3S,6Z,8E,11S,15R)-15-amino-3-[(1E,3E,5E)-7-(dimethylamino)-2,5-dimethylhepta-1,3,5-trien-1-yl]-9,11-dimethyl-4,12-dioxa-20-thia-21-azabicyclo[16.2.1]henicosa-1(21),6,8,18-tetraene-5,13-dione V6D