Tacrolimus Monohydrate Imp.H(EP):(1E,3S,4R,5S,8R,9E,12S,14S)-5-hydroxy-1-[(1R,3R,4R)-4-hydroxy-3-methoxycyclohexyl]-14-methoxy-14-[(2R,3S,5R)-3-methoxy-5-methyl-6-oxooxan-2-yl]-2,4,10,12-tetramethyl-7-oxo-8-(prop-2-en-1-yl)tetradeca-1,9-dien-3-yl (2S.