1-[4-(1-Pyrrolidinyl)-2-butynyl]-2-pyrrolidinone 2'-Oxopyrrolidino-1-pyrrolidino-4-butyne 2-Pyrrolidinone, 1-[4-(1-pyrrolidinyl)-2-butynyl]- 70-22-4 NSC330497 Oxotremorin Oxotremorine Oxytremorine Tremorine, oxo- WLN: T5NVTJ A2UU2- AT5NTJ