104987-11-3 109581-93-3 (MONOHYDRATE) AIDS-006649 AIDS006649 FK-506 FK506 FR900506 Prograf Tacrolimus [3S-[3R*[E(1S*,3S*,4S*)],4S*,5R*,8S*,9E,12R*, 14R*,15S*,16R*,18S*,19S*,26aR*]]-5,6,8,11,12,13, 14,15,16,17,18,19,24,25,26,26a-Hexadecahydro-5, 19-dihydroxy-3-[2-(4-hydroxy-3- methoxycyclohexyl)-1-