37333-48-5 7,8-Didemethyl-8-hydroxy-5-deazariboflavin 8-Hydroxy-5-deazaflavin D-Ribitol, 1-deoxy-1-(3,4-dihydro-8-hydroxy-2,4-dioxopyrimido(4,5-b)quinolin-10(2H)-yl)- F(420) factor 420