Tacrolimus Impurity 5

Chemical Name: (S)-1-(2-((2R,3R,5S,6R)-6-((1S,3S,5E,7R,10S,11R,12S,13E)-7-allyl-10,12-dihydroxy-14-((1R,3R,4R)-4-hydroxy-3-methoxycyclohexyl)-1-methoxy-3,5,11,13-tetramethyl-8-oxotetradeca-5,13-dien-1-yl)-2-hydroxy-5-methoxy-3-methyltetrahydro-2H-pyran-2-yl)-2-oxoacetyl)piperidine-2-carboxylic acid