The isolation of crystalline i-urobilinogen (mesobilirubinogen) from feces. Comparison with crystalline d-urobilinogen (H44) and seprartion of natural i-urobilin into optically active components.

The isolation of crystalline i-urobilinogen (mesobilirubinogen) from feces. Comparison with crystalline d-urobilinogen (H44) and seprartion of natural i-urobilin into optically active components.