23H,25H-Benzo[b]porphine-9,13-dipropanoic acid, 18-ethenyl-2,4a-dihydro-3,4-bis(methoxycarbonyl)-4a,8,14,19-tetramethyl-, dimethyl ester (9CI)

VWN38241, also known as BPD-A-1,4-diene , and benzoporphyrin derivative Ring A -1,4-diene, is an important precursor for making PDT drug verteporfin. Verteporfin (trade name Visudyne), a benzoporphyrin derivative, is a medication used as a photosensitizer for photodynamic therapy to eliminate the abnormal blood vessels in the eye associated with conditions such as the wet form of macular degeneration. This product has no formal name at the moment.