19-表FK-506 生成 (1S,9S,12S,13R,14S,17R,18E,21S,23S,24R,25S,27R)-1-hydroxy-23,25-dimethoxy-12-[(E)-1-[(1R,3R,4R)-3-methoxy-4-tri(propan-2-yl)silyloxycyclohexyl]prop-1-en-2-yl]-13,19,21,27-tetramethyl-17-prop-2-enyl-14-tri(propan-2-yl)silyloxy-11,28-dioxa-4-azatricyclo[22.3.1.04,9]octacos-18-ene-2,3,10,16-tetrone