653574-33-5 5,45:6,12:15,19:22,28:29,35:38,42-Hexamethenotetrabenzo[a,e,t,x]cyc looctatriacontene-47,49,50,52-tetrol, 13,14,20,21,36,37,43,44-octadehydro-, (5R,28R)- 3656-32-4 Pyrazino[2,3-g]quinoxaline-2,3,7,8-tetrol (en)pyrazino[2,3-g]quinoxaline-2,3,7,8(1h,4h)-tetrone, 6,9-dihydro- (en)