Synonyms: 2,4-Cyclohexadien-1-one,3,5,6-trihydroxy-2-isovaleryl-4,6-bis(3-methyl-2-butenyl)-, (R)-(-)- (8CI);2,4-Cyclohexadien-1-one,3,5,6-trihydroxy-4,6-bis(3-methyl-2-butenyl)-2-(3-methyl-1-oxobutyl)-, (6R)-(9CI); 2,4-Cyclohexadien-1-one,3,5,6-trihydroxy-4,6-bis(3-methyl-2-butenyl)-2-(3-methyl-1-oxobutyl)-, (R)-; (-)-(R)-Humulone;(-)-Humulone; Humulon; Humulone; Humulone a-acid; a-Acid