CAS: 23984-55-6 Molecular Formula: C40H54O2 Molecular Weight (g/mol): 566.86 Synonym: (3R,6'R)-3-Hydroxy-β,ε-caroten-3'-one,all-trans-3-Hydroxy-α-caroten-3'-one,3'-Oxolutein,Philosamiaxanthin,all-trans-Philosamiaxanthin; SMILES: O=C1CC(C)(C)[C@@H](/C=C/C(C)=C/C=C/C(C)=C/C=C/C=C(C)/C=C/C=C(/C=C/C2=C(C)C[C@@H](O)CC2(C)C)C)C(C)=C1