Synonyms: Semduramicin,2-methyl-5-O-(tetrahydro-5-methoxy-6-methyl-2H-pyran-2-yl)-, [2R,5(2S,5S,6R)]-;1,6-Dioxaspiro[4.5]decane, semduramicin deriv.; 2H-Pyran-2-acetic acid,tetrahydro-2-hydroxy-6-[1-[9-hydroxy-2,8-dimethyl-2-[octahydro-2-methyl-5'-(tetrahydro-6-hydroxy-3,5,6-trimethyl-2H-pyran-2-yl)-3'-[(tetrahydro-5-methoxy-6-methyl-2H-pyran-2-yl)oxy][2,2'-bifuran]-5-yl]-1,6-dioxaspiro[4.5]dec-7-yl]ethyl]-5-methoxy-a,3-dimethyl-4-[(tetrahydro-5-methoxy-6-methyl-2H-pyran-2-yl)oxy]-,[2S-[2a,2(S*),3a,4b(2R*,5R*,6S*),5a,6b[S*[2R*[2R*,2'S*,3'R*(2R*,5R*,6S*),5S*,5'S*(2R*,3R*,5S*,6R*)],5S*,7R*,8S*,9R*]]]]-;CP 72588;2H-Pyran-2-acetic acid,tetrahydro-2-hydroxy-6-[(1R)-1-[(2S,5R,7S,8R,9S)-9-hydroxy-2,8-dimethyl-2-[(2S,2'R,3'S,5R,5'R)-octahydro-2-methyl-5'-[(2S,3S,5R,6S)-tetrahydro-6-hydroxy-3,5,6-trimethyl-2H-pyran-2-yl]-3'-[[(2S,5S,6R)-tetrahydro-5-methoxy-6-methyl-2H-pyran-2-yl]oxy][2,2'-bifuran]-5-yl]-1,6-dioxaspiro[4.5]dec-7-yl]ethyl]-5-methoxy-a,3-dimethyl-4-[(tetrahydro-5-methoxy-6-methyl-2H-pyran-2-yl)oxy]-,(aR,2S,3S,4S,5R,6S)- (9CI)