1922-67-4 1H-Naphtho(2,3-c)pyran, 3,4,6,7,8,9-hexahydro-4,6,6,9,9-pentamethyl- 3,4,6,7,8,9-Hexahydro-4,6,6,9,9-pentamethyl-1-naphtho(2,3-c)pyran 3,4,6,7,8,9-Hexahydro-4,6,6,9,9-pentamethyl-1H-naphtho(2,3-c)pyran EINECS 217-652-9