| abstract |
to treat various clinical conditions including, but not limited to, hemorrhagic shock, nicotine withdrawal symptoms, gastrointestinal side effects of opioids, cancer therapy, epithelial wounds, herpes zoster infection, or opioid-induced pruritus. In compound of Formula I, R1 is C1-10 alkyl, C1-10 haloalkyl, optionally substituted aryl, or optionally substituted heteroaryl; R2 is C1-6 alkylene; Y is optionally substituted aryl, optionally substituted heteroaryl, or a moiety of the formula —C(═O)—X1, wherein X1 is —OR3 or —NR4R5, where each of R3, R4 and R5 is H or C1-10 alkyl. |