Process for preparing a stable non-hygroscopic crystalline n-(n-(n- piperdin- 4-yl)butanoyl)- n.ethylglycyl)- (l)-aspartyl) -ss-cyclohexylalanine amide

摘要

This invention is directed to a method converting the hygroscopic polymorph of N-[N-[N- (4-piperdin- 4-yl)butanoyl) -N-ethylglycyl] -(L)-aspartyl] -(L)- beta -cyclohexylalanine amide to its stable, non-hygroscopic crystal form.