Carbamic acid, 1,3,5-triazine-2,4,6-triyltris-, mixed Bu and Me triesters

A mixture of: 2,4,6-tri(butylcarbamoyl)-1,3,5-triazine 2,4,6-tri(methylcarbamoyl)-1,3,5-triazine [(2-butyl-4,6-dimethyl)tricarbamoyl]-1,3,5-triazine [(2,4-dibutyl-6-methyl)tricarbamoyl]-1,3,5-triazine