We report the full structural determination of the depsipeptide petriellin A. The absolute configuration of the amino acid residues, N-methyl isoleucine and N-methyl threonine, have been determined by a combination of HPLC and TLC comparison of synthetic Marfey’s derivatives and Marfey’s derivatives of the natural product hydrolysate. The configuration of the chiral centres in these two N-methylated residues was found to be the same as those of the common unmethylated l-amino acids.
通过对合成的马菲氏衍生物和天然产物水解物的马菲氏衍生物进行 HPLC 和 TLC 比较,我们确定了 N-甲基异亮氨酸和 N-甲基苏氨酸这两个氨基酸残基的绝对构型。结果发现,这两个 N-甲基化残基的手性中心构型与常见的未甲基化 l-氨基酸的手性中心构型相同。