Synonyms: Semduramicin,5-O-(tetrahydro-5-methoxy-6-methyl-2H-pyran-2-yl)-, [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-3-methyl-4-[(tetrahydro-5-methoxy-6-methyl-2H-pyran-2-yl)oxy]-,[2R-[2a,3a,4b(2S*,5S*,6R*),5a,6b[R*[2S*[2S*,2'R*,3'S*(2S*,5S*,6R*),5R*,5'R*(2S*,3S*,5R*,6S*)],5R*,7S*,8R*,9S*]]]]-;Antibiotic UK 58852;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-3-methyl-4-[[(2S,5S,6R)-tetrahydro-5-methoxy-6-methyl-2H-pyran-2-yl]oxy]-,(2R,3S,4S,5R,6S)- (9CI)