Structure of pyridindolol, inhibitor of beta-galactosidase.

Pyridindolol is a product of a streptomyces and exhibits inhibitory activity against bovine liver beta-galactosidase. The structure of pyridindilol, 1-[1(R), 2-dihydroxyethyl]-3-hydroxymethyl-9H-pyrido[3,4-b] indole, has been established by spectroscopic analyses and an X-ray structure determination.