1977-33-9 1990-07-4 BUTYRIC ACID, 4-(2,4-DIHYDROXY-3,3-DIMETHYLBUTYRAMIDO)-, CALCIUM SALT, HYDRATE ( Butanoic acid, 4-((2,4-dihydroxy-3,3-dimethyl-1-oxobutyl)amino)-, calcium salt (2:1) Butyric acid, 4-(2,4-dihydroxy-3,3-dimethylbutyramido)-, calcium salt (2:1) Butyric acid, 4-(2,4-dihydroxy-3,3-dimethylbutyramido)-, calcium salt,