2,7-Naphthalenedisulfonicacid,4-[2-[2,4-dihydroxy-5-[2-(2-hydroxy-3,5-dinitrophenyl)diazenyl]-3-[2-(4-nitrophenyl)diazenyl]phenyl]diazenyl]-5-hydroxy-,sodium salt (1:2);2,7-Naphthalenedisulfonicacid,4-[[2,4-dihydroxy-5-[(2-hydroxy-3,5-dinitrophenyl)azo]-3-[(4-nitrophenyl)azo]phenyl]azo]-5-hydroxy-,disodium salt (9CI); 

Friedelin;Friedelan-3-one;