Figure 1

Chemical structures of piracetam and noopept. The structural similarity of piracetam (A) to noopept (B). Both molecules contain pyrrolidine ring, acylated nitrogen in this ring, amide moiety and the fragment of glycine.
Chemical structures of piracetam and noopept. The structural similarity of piracetam (A) to noopept (B). Both molecules contain pyrrolidine ring, acylated nitrogen in this ring, amide moiety and the fragment of glycine.