Synonyms: (2E,4E)-5-[(1R,7S,8S,9R)-7-Acetoxy-4,9-dimethyl-11-oxo-10-oxatricyclo[6.3.2.0~1,7~]tridec-3-en-9-yl]-2-methylpenta-2,4-dienoic acid;2,4-pentadienoic acid, 5-[(3R,4S,4aS,9aR)-4a-(acetyloxy)-3,4,4a,5,6,9-hexahydro-3,7-dimethyl-1-oxo-1H-4,9a-ethanocyclohepta[c]pyran-3-yl]-2-methyl-, (2E,4E)-