... XCIVJ'z' Thiazoline—Z-thione as a Carboxyl- activating Reagent for Peptide Synthesis HARUAKI YAJIMA, KENICHI AKAJI, YORIKO HIROTA, and NOBUTAKA FUJII,3) Faculty of ... 1). The 1) Part XCVIII: H. Yajirna, N. Fujii, Y. Ilirota, Y. Nasada, Y. Hirai, and T. Nakajirna, JZt. ]. ...