2,5,5,8a-Tetramethyl-6,7,8,8a-tetrahydro-5H-1-benzopyran 5552-30-7 5H-1-Benzopyran, 6,7,8,8a-tetrahydro-2,5,5,8a-tetramethyl- 5H-Benzopyran, 6,7,8,8a-tetrahydro-2,5,8a-tetramethyl- 6,7,8,8a-Tetrahydro-2,5,5,8a-tetramethyl-(5H)-1-benzopyran 6,7,8,8a-Tetrahydro-2,5,5,8a-tetramethyl-5H-1-benzopyran Cycloionone EINECS 226-916-2