AC1-IN-38 is a potent, selective inhibitor of adenylyl cyclase type 1 (AC1) with IC50 of 0.54 uM.AC1-IN-38 shows selectivity over a closely related isoform AC8, and no activity against AC2/5 and other common neurological targets.AC1-IN-38 displayed modest antiallodynic effects in a mouse model of inflammatory pain.