(1S,2S,7S,10R,11S,14S,15S)-14-hydroxy-2,14,15-trimethyl-4-oxatetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadecan-5-one
(1S,2S,7S,10R,11S,14S,15S)-14-hydroxy-2,14,15-trimethyl-4-oxatetracyclo[8.7.0.02,7.011,15]heptadecan-5-one
(1S,2S,7S,10R,11S,14S,15S)-14-hydroxy-2,14,15-trimethyl-4-oxatetracyclo[8.7.0.0²,⁷.0¹¹,¹⁵]heptadecan-5-one