(1-Hydroxy-2,10,10-trimethyl)-3-methylenetricyclo(6.3.0.0(2,6))undec-5,7-diene-4,9-dione 135048-13-4 1H-Cyclopenta(a)pentalene-1,5(2H)-dione, 3,3a,3b,4-tetrahydro-3a-hydroxy-2,2,3b-trimethyl-4-methylene-, trans- Incarnal