geranylgeranyl group 273.47602 0 CC(=CCC/C(=C/CC/C(=C/CC/C(=C/C*)/C)/C)/C)C (2E,6E,10E)-3,7,11,15-tetramethyl-2,6,10,14-hexadecatetraen-1-yl group CHEBI:24231 C20H33 273.25823 chebi_ontology (2E,6E,10E)-3,7,11,15-tetramethylhexadeca-2,6,10,14-tetraen-1-yl polyprenyl group