pterobilin

Pterobiline

8,13-Divinyl-1,19,22,24-tetrahydro-3,7,12,17-tetramethyl-1,19-dioxo-21H-biline-2,18-dipropionic acid

8,13-Diethenyl-1,19,22,24-tetrahydro-3,7,12,17-tetramethyl-1,19-dioxo-21H-biline-2,18-dipropionic acid