Synonyms: 1,3-Cyclohexadiene,2-methyl-5-(1-methylethyl)-, (R)-; p-Mentha-1,5-diene, (-)- (7CI);p-Mentha-1,5-diene, (R)-(-)- (8CI); (-)-(R)-a-Phellandrene; (-)-a-Phellandrene; (R)-(-)-a-Phellandrene; (R)-a-Phellandrene; l-a-Phellandrene; a-Phellandrene, (-)-