New conjugates were synthesized by the reaction of acetylsalicylic acid chlorides, naproxen, ibuprofen and ketoprofen with amine-containing derivatives at the 2- and 6-positions of maleopimaric acid. The structure of the synthesized compounds was proven by NMR and mass spectroscopy methods, and elemental analysis data.
G. F Vafina (Wed,) studied this question.