1 C3F 3-[7,8-dimethyl-2,4-bis(oxidanylidene)benzo[G]pteridin-10-yl]propylcarbamic acid 1.000 2 LFN Lumiflavin 0.760 3 LUM Lumichrome 0.720 4 CF4 [4-(7,8-dimethyl-2,4-dioxo-3,4-dihydrobenzo[G]pteridin-10(2h)-yl)butyl]carbamic acid 0.700