7757-97-3 Butanamide, N-(3-amino-3-oxopropyl)-2,4-dihydroxy-3,3-dimethyl-, (R)- Butyramide, N-(2-carbamoylethyl)-2,4-dihydroxy-3,3-dimethyl-, D- N-(2-Carbamoylethyl)-2,4-dihydroxy-3,3-dimethylbutyramide,