α-curcumene (compound 12) is isolated from the essential oil of rhizomes of Curcuma aromatica and can be synthesized artificially[1].
ChEBI: A sesquiterpene that is 2-methyl-2-heptene in which one of the hydrogens at position 6 is substituted by a p-tolyl group.
[1] P.P. Mahulikar, et al. Application of Meldrum’s acid in natural product synthesis. Synthesis of ar-turmerone and α-curcumene. JOURNAL OF CHEMICAL RESEARCH. 2006. 15.