4-Acetyloxy-8-hydroxy-2-methylene-6,10,10-trimethyl-bicyclo(7.2.0)undec-5-ene-3,7-dione 92121-62-5 Bicyclo(7.2.0)undec-4-ene-3,7-dione, 6-(acetyloxy)-2-hydroxy-4,11,11-trimethyl-8-methylene-, (1R-(1R*,2R*,4E,6R*,9S*))- Naematolon