Synonyms: 1-Oxaspiro[2.5]octan-6-ol,5-methoxy-4-[(2R,3R)-2-methyl-3-(3-methyl-2-butenyl)oxiranyl]-, (3R,4S,5S,6R)-(9CI); 1-Oxaspiro[2.5]octan-6-ol,5-methoxy-4-[2-methyl-3-(3-methyl-2-butenyl)oxiranyl]-, [3R-[3a,4a(2R*,3R*),5b,6b]]-; (-)-Fumagillol; FOS 37; Fumagillol