3-Methyl-5-(2,2,3-trimethyl-3-cyclopenten-1-yl)-4-penten-2-one 3-Methyl-5-(2,2,3-trimethyl-3-cyclopenten-1-yl)pent-4-en-2-one 4-Penten-2-one, 3-methyl-5-(2,2,3-trimethyl-3-cyclopenten-1-yl)- 67801-15-4 EINECS 267-135-7