Petasol Synonym: (3S,4aR,5R,6R)-6-hydroxy-4a,5-dimethyl-3-prop-1-en-2-yl-3,4,5,6,7,8-hexahydronaphthalen-2-one Or Cephalochromin. Chemical Formula: C15H22O2 CAS number: 64236-38-0 DOI: 10.1038/ja.2017.125