Maleated rosin was prepared by using rosin,a natural product,as starting material. Then,ten novel maleated rosin-based dithiourea-amidecompounds 7 a-7 j were synthesized via a multiple-step process. The targeted compounds were analyzed and characterized by FT-IR,1 H NMR,13 C NMR,ESI-MS,and UV-vis. The preliminary bioassay showed that,at the concentration of 50 μg/m L,the targeted compounds exhibited a certain antifungal activity against the five tested phytopathogens. Most of the compounds displayed inhibit...