1,5,9-Cyclotetradecatriene, 1,5,9-trimethyl-12-(1-methylethenyl)-, (R-(E,E,E))- 1,5,9-Trimethyl-12-(1-methylethenyl)-1,5,9-cyclotetradecatriene 31570-39-5 Cembrene A Neocembrene