Acetamide, N-[6,8-bis[[4-[[(3,4-dimethyl-5-isoxazolyl)amino]sulfonyl]phenyl]azo]-5-hydroxy-1-naphthalenyl)]-2,2-dichloro-, compd. with 4,4'-[[4-(methylamino)phenyl]methylene]bis[N,N-dimethylbenzenamine] monohydrochloride (1:1) NSC337381