C=C(C(=O)OC)[C@@H]1CC[C@@](C)(O)[C@@H]2CC[C@@](C)(O2)[C@@H](OC(C)=O)CC[C@]2(C)O[C@H]2C1	methyl 2-((1R,2S,5S,7S,9R,12R,13S)-2-(acetyloxy)-12-hydroxy-1,5,12-trimethyl-6,16-dioxatricyclo[11.2.1.0^{5,7}]hexadecan-9-yl)prop-2-enoate