<qa>  What is the target receptors known to play important roles in the induction and transmission of painVVZ-149 injection, an investigational product IP in this clinical study, is a multi-target analgesic drug candidate against glycine transporter type II GlyT2 and serotonin receptor 2A 5HT2A. The target receptors have been known to play important roles in the induction and transmission of pain signals in the pain-related neural system. There have been efforts to develop new drugs that selectively antagonize the GlyT2 or 5HT2A, but it was unsuccessful due to limitations of single-target drugs. VVZ-149 showed morphine-comparable analgesic and gabapentin-comparable anti-allodynic effects in various rat models of pain. 