1,​2-​Ethanedione, 1-​(4-​benzoyl-​1-​piperazinyl)​-​2-​[4-​methoxy-​7-​(3-​methyl-​1H-​1,​2,​4-​triazol-​1-​yl)​-​1-​[(phosphonooxy)​methyl]​-​1H-​pyrrolo[2,​3-​c]​pyridin-​3-​yl]​-​, compd. with 2-​amino-​2-​(hydroxymethyl)​-​1,​3-​propanediol (1:1)