Synonyms: 4,6,8,10,12-Heptadecapentaenoicacid,15-hydroxy-16-[(2S,3S,5S,6R,8R,9R,10R)-5-hydroxy-8-[(1R,2S,3S,5E)-2-hydroxy-1,3,5-trimethyl-5-octenyl]-10-methoxy-3,9-dimethyl-1,7-dioxaspiro[5.5]undec-2-yl]-3-methoxy-14-methyl-,(3S,4Z,6E,8Z,10E,12Z,14S,15S,16S)- (9CI); 1,7-Dioxaspiro[5.5]undecane,4,6,8,10,12-heptadecapentaenoic acid deriv.; Spirangien B; Spirangiene B