Synonyms: TRANS-ISOHUMULONE;ISOHUMULONEA2;ISOHUMULONEA;(4S)-2-(1-Oxo-3-methylbutyl)-3,4-dihydroxy-4-(1-oxo-4-methyl-3-pentenyl)-5α-prenyl-2-cyclopentene-1-one;(4S,5S)-2-(3-Methylbutyryl)-3,4-dihydroxy-4-(4-methyl-3-pentenoyl)-5-(3-methyl-2-butenyl)-2-cyclopentene-1-one;(4S,5S)-3,4-Dihydroxy-5-(3-methyl-2-butenyl)-2-(3-methyl-1-oxobutyl)-4-(4-methyl-1-oxo-3-pentenyl)-2-cyclopenten-1-one;2-(3-Methylbutyryl)-3,4β-dihydroxy-4-(1-oxo-4-methyl-3-pentenyl)-5α-(3-methyl-2-butenyl)-2-cyclopentene-1-one;2-(3-Methylbutyryl)-3,4β-dihydroxy-4-(4-methyl-3-pentenoyl)-5α-(3-methyl-2-butenyl)-2-cyclopentene-1-one