2-Naphthalenevaleric acid, 5,6,7,8-tetrahydro-alpha,alpha-dimethyl- 5,6,7,8-Tetrahydro-alpha,alpha-dimethyl-2-naphthalenevaleric acid QK4126000 alpha,alpha-Dimethyl-5,6,7,8-tetrahydronaphthyl-2-valeric acid alpha,alpha-Dimethyl-5,7,6,8-tetrahydro-2-naphthalenevaleric acid