Abstract The lead optimization studies of a series of GPR119 agonists incorporating a nortropanol scaffold are described. Extensive structure–activity relationship (SAR) studies of the lead compound 20f led to the identification of compound 36j as a potent, single digit nanomolar GPR119 agonist with high agonist activity. Compound 36j was orally active in lowering blood glucose levels in a mouse oral glucose tolerance test and increased ...