... 0 IIb: A=CH2CH2COOH, B=styryl IIIb: n=1 IIIc: n = 2 Chart 1 Chemistry The 4 ... Chemical shifts are given in ppm and the following abbreviations are used: s=singlet, d=doublet ... This work was presented at the 105th Annual Meeting of the Pharmaceutical Society of Japan, Kanazawa ...