ML-109 is a potent and full thyroid stimulating hormone receptor (TSHR) agonist, with an EC 50 of 40 nM.
In Vitro
ML-109 (Compound 2) is a full agonist at TSHR with an EC 50 of 40 nM and, like compound 1, it has no activity at FSHR or LHCGR. ML-109 contains an aminal, a functional group that is subject to hydrolysis and/or other degradation mechanisms. ML-109 is surprisingly stable at neutral and basic conditions (t 1/2 of ~16 h) but is found to degrade at low pH (t 1/2 of ~3 h). MCE has not independently confirmed the accuracy of these methods. They are for reference only.
