n m r spectra of 41 carbon signals including six C-0, 30 aromatic carbons, and five carboxylic ester or acid carbonyl carbonsintherange of864 through78,105 through 149,and 166through 171 ppm, respectively
n m r spectra of 41 carbon signals includingsix C-0, 30 aromatic carbons, andfive carboxylic ester or acid carbonyl carbonsintherangeof864 through78,105through 149,and 166through 171 ppm,respectively