“…They all increase the application options for MCRs, such as MCR nanosystems and mechanochemical reactions [ 65 ]. MCRs have been also applied in polymer [ 74 ], nucleoside [ 75 ] and carbohydrate [ 76 ] chemistry. Main field of application remains the production of heterocyclic compounds and many natural products by means of MCR [ 38 , 42 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 ], leading directly towards drug design and discovery [ 89 , 90 , 91 , 92 , 93 ].…”