... 12 EC Kooyman and 1. P. Wibaut. ... The potassium chloride which has separated out and the palladium are filtered off and the filtrate is evaporated until the volume is about ... by G r a f 6). 2-Methylpyridine-5-carfwxylic acid (I V). 111 is saponified by heating with a 10% solution of ...