(2R,2(1)S)-2(1),2(2)-dicarboxy-8-ethenyl-2,7,12,18-tetramethyl-2,2(1)-dihydrobenzo[b]porphyrin-13,17-dipropanoic acid
(2r,2(1)s)-2(1),2(2)-dicarboxy-8-ethenyl-2,7,12,18-tetramethyl-2,2(1)-dihydrobenzo[b]porphyrin-13,17-dipropanoic acid
2,2<small><sup>1</small></sup>-Dihydrobenzo[<em>b</em>]porphyrin-13,17-dipropanoic acid substituted by carboxy groups at positions 2<small><sup>1</small></sup> and 2<small><sup>2</small></sup>, an ethenyl group at position 8, and methyl groups at positions 2, 7, 12 and 18 (the 2<i>R</i>,2<small><sup>1</small></sup><i>S</i>-enantiomer).