1-(3-Methyl-4-methoxyphenyl)-methyl-5-diphenylacetyl-4,5,6,7-tetrahydro-1H-imidazo(4,5-c)pyridine-6-carboxylic acid 114785-18-1 1H-Imidazo(4,5-c)pyridine-6-carboxylic acid, 5-(diphenylacetyl)-4,5,6,7-tetrahydro-1-((4-methoxy-3-methyphenyl)methyl)- PD 121981 WL 19 WL-19