1-Piperazinecarboxamide,N,N-diethyl-4- methyl-,2-hydroxy-1,2,3-propanetricarboxylate (1:1),mixt. with 1,4,5,6-tetrahydro-1-methyl-2-[(1E)-2-(3- methyl-2-thienyl)ethenyl]pyrimidine