SMILES: CC1=CC2=C(C=C1C)N(C3=NC(=O)NC(=O)C3N2)C[C@@H]([C@@H]([C@@H](CO)O)O)O
Description: The molecule is riboflavin in which the double bond between positions 4a and 5 has been reduced to a single bond. It is a tautomer of a 1,5-dihydroriboflavin.