129119-76-2 4a-Fletoh 5-Ethyl-4,4a,5,10-tetrahydro-4a-hydroxy-3,7,8,10-tetramethylbenzo(g)pteridin-2(3H)-one Benzo(g)pteridin-2(3H)-one, 5-ethyl-4,4a,5,10-tetrahydro-4a-hydroxy-3,7,8,10-tetramethyl- N(5)-Ethyl-4a-hydroxy-3-methyl-4a,5-dihydrolumiflavin