... 2445) and DACA from Wako Pure Chemical Industries Ltd ... The other chemicals were of reagent grade ... Gm, 316, 105 (1983); T. Yamarnori, Y. Hiramatsu, K. Sakai, and I. Adachi, Abstracts of Papers, 9th International Congress of Heterocyclic Chemistry, Tokyo, August 1983, p. 204 ...