Synonyms: Ajmaline phenylethylbarbiturate;Ajmaline ethylphenylbarbiturate;Barbituric acid, 5-ethyl-5-phenyl-, compd. with ajmaline;2,4,6(1H,3H,5H)-Pyrimidinetrione, 5-ethyl-5-phenyl-, compd. with (17R,21alpha)-ajmalan-17,21-diol;Ajmalan-17,21-diol, (17R,21alpha)-, compd. with 5-ethyl-5-phenyl-2,4,6(1H,3H,5H)-pyrimidinetrione;Ajmaline, compound with 5-ethyl-5-phenylbarbituric acid;5-ethyl-5-phenylpyrimidine-2,4,6(1H,3H,5H)-trione - (2xi,3xi,15alpha,16xi,20alpha,21beta)-ajmalan-17,21-diol (1:1)