EST73502 is an agonist of μ-opioid receptor(Ki = 64 nM) agonist and an antagonist of σ1 receptor (Ki = 118 nM). EST73502 displays antinociceptive activity.

Store at -20℃ for one year（Powder）；Store at 2-4℃ for two weeks；Store at -20℃ for six months after dissolution.

DMSO:50 mg/mL (128.57 mM)

δ-opioid receptor:118 nM(Ki), μ-opioid receptor:64 nM(Ki)

In CD1 male mice, EST73502 (10-40 mg/kg; p.o.) shows a dose-response analgesic effect reaching a maximum of 64% and an EC50 of 14 mg/kg in the paw pressure test. EST73502 (5 mg/kg; i.p.) attenuated the expression of mechanical allodynia induced by PSNL, reaching a maximal effect of 56%[1].