... Monatshefte für Chemie - Chemical Monthly. January 2012 , Volume 143, Issue 1, pp 153-159. ... 5-[4-(ω-Ethoxycarbonylalkyloxy)phenyl]-10,15,20-tritolylporphyrin (0.03 g, ~0.04 mmol) dissolved in 10 cm 3 dichloromethane was added to a solution of sodium ethoxide (1 g sodium ...