Synonyms: Semduramicin;1,6-Dioxaspiro[4.5]decane, semduramicin deriv.; 2H-Pyran-2-acetic acid,tetrahydro-2,4-dihydroxy-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-,[2R-[2a,3a,4b,5a,6b[R*[2S*[2S*,2'R*,3'S*(2S*,5S*,6R*),5R*,5'R*(2S*,3S*,5R*,6S*)],5R*,7S*,8R*,9S*]]]]-;Semduramycin; Stereoisomer oftetrahydro-2,4-dihydroxy-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-2H-pyran-2-aceticacid; UK 61689