... The 3-pyrrolylacetic acids have relevance in the chemistry of porphyrins and antiinflammatory drugs ... The aqueous layer was extracted with dichloromethane (2 X 100 mL), and the combined organic layer was washed ... H, dd, J = 1.5, 3.4 Hz, C4 H), 7.17 (1 H, dd, J = 2.3, 3.4 Hz, C5