diterpenoid Norbixin 0 380.19876 380.484 cas:542-40-5 CC(/C=C/C=C(C)/C=C/C(=O)O)=CC=CC=C(C)C=CC=C(C)C=CC(=O)O Norbixin C24H28O4 knapsack:C00003782 ZVKOASAVGLETCT-UOGKPENDSA-N CHEBI:7623 kegg.compound:C08608 chebi_ontology InChI=1S/C24H28O4/c1-19(11-7-13-21(3)15-17-23(25)26)9-5-6-10-20(2)12-8-14-22(4)16-18-24(27)28/h5-18H,1-4H3,(H,25,26)(H,27,28)/b6-5+,11-7+,12-8+,17-15+,18-16+,19-9+,20-10+,21-13+,22-14+