135. 7-{2-Hydroxy-3-[(2-hydroxyethyl)methylamino]propyl}-1,3-dimethyl-1,2,3,6-tetrahydro-9H-purin-2,6-dion^● (xanthinol)
7-[2-Hydroxy-3-(2-hydroxyethyl-N-methylamino)propyl] theophylline (xanthinol)°