Isoseryl S-Methylcysteamine Sulfoxide, a New Amide in the Tubers of Sarutori-Ibara (Smilax china)

Abstract

A new amide, isoseryl S-methylcysteamine sulfoxide, was isolated from the tubers of Sarutori-Ibara (Smilax china, Liliaceae). Two components obtained by hydrolysis of the amide were identified as isoserine and S-methylcysteamine sulfoxide, respectively, by FD-high MS spectrum and comparison with authentic samples.