166978-49-0 Benzoic acid, 4-((5,6,7,8-tetrahydro-5,5-dimethyl-8-oxo-2-naphthalenyl)ethynyl)-, ethyl ester Ethyl 4-((5,6,7,8-tetrahydro-5,5-dimethyl-8-oxo-2-naphthalenyl)ethynyl)benzoate