Synonyms: AAG; FK-520; FR-900520; IMMUNOMYCIN; ASCOMYCIN, STREPTOMYCES HYGROSCOPICUS; ASCOMYCIN, STREPTOMYCES HYGROSCOPICUS VAR ASCOMYCETICUS; 12,18-tetramethyl-,(3s-(3r*(e(1s*,3s*,4s*)),4s*,19s*,26ar*))--10; 8-ethyl-3-(2-(4-hydroxy-3-methoxycyclohexyl)-1-methylethenyl)-14,16-dimethoxy