Verteporfin, som også betegnes benzoporphyrin monosyrederivat (BPD- MA), består af en 1: 1 blanding af de lige aktive regioisomerer BPD- MAC og BPD- MAD.
Verteporfin, also referred to as benzoporphyrin derivative monoacids (BPD-MA) consists of a 1:1 mixture of the equally active regioisomers BPD-MAC and BPD-MAD.