2-Pyrrolidinone, 4-(aminomethyl)-1-(phenylmethyl)- 4-Aminomethyl-1-benzylpyrrolidine-2-one 97205-34-0 97205-35-1 Nebracetam (unspecified) Web 1881 Web 1881 FU Web 1881FU Web-1881-FU nebracetam