Cyclopropa(4,5)cyclopenta(1,2-C)pyridine-6-carboxylic acid, 3-((2',6'-dimethyl-4'-(3-(methylsulfonyl)propoxy)(1,1'-biphenyl)-3-yl)methoxy)-5,5a,6,6a-tetrahydro-, (5aR,6S,6aS)-
MK-8666 is under investigation in clinical trial NCT01971554 (Safety, Tolerability, Pharmacodynamics, and Pharmacokinetics of MK-8666 in Participants With Type 2 Diabetes Mellitus (MK-8666-003)).