IUPAC:(1'R,2R,4'S,5S,6R,8'R,10'E,13'R,14'E,16'E,20'R,21'Z,24'S)-24'-hydroxy-21'-(hydroxyimino)-5,6,11',13',22'-pentamethyl-3',7',19'-trioxaspiro[oxane-2,6'-tetracyclo[15.6.1.1^{4,8}.0^{20,24}]pentacosane]-10',14',16',22'-tetraen-2'-one; (1'R,2R,4'S,5S,6R,8'R,10'E,13'R,14'E,16'E,20'R,21'Z,24'S)-6-ethyl-24'-hydroxy-21'-(hydroxyimino)-5,11',13',22'-tetramethyl-3',7',19'-trioxaspiro[oxane-2,6'-tetracyclo[15.6.1.1^{4,8}.0^{20,24}]pentacosane]-10',14',16',22'-tetraen-2'-one
IUPAC:(1'R,2R,4'S,5S,6R,8'R,10'E,13'R,14'E,16'E,20'R,21'Z,24'S)-24'-hydroxy-21'-(hydroxyimino)-5,6,11',13',22'-pentamethyl-3',7',19'-trioxaspiro[oxane-2,6'-tetracyclo[15.6.1.1^{4,8}.0^{20,24}]pentacosane]-10',14',16',22'-tetraen-2'-one; (1'R,2R,4'S,5S,6R,8'R,10'E,13'R,14'E,16'E,20'R,21'Z,24'S)-6-ethyl-24'-hydroxy-21'-(hydroxyimino)-5,11',13',22'-tetramethyl-3',7',19'-trioxaspiro[oxane-2,6'-tetracyclo[15.6.1.1^{4,8}.0^{20,24}]pentacosane]-10',14',16',22'-tetraen-2'-one