geranylgeranylacetone [ teprenon,6,10,14,18-tetramethyl-5,9,13,17-nonadecatetraen-2-one,geranyl-geranyl-acetone,geranylgeranylacetone, (E,E,E)-isomer,geranylgeranylacetone, (Z,E,E)-isomer,teprenone,tetraprenyl acetone,tetraprenylacetone ] structure in first source; RN given refers to isomeric cpd without isomeric designation; mixture of (5E,9E,13E) & (5Z,9E,13E)-isomers