In parts Ⅰ^[4] and Ⅱ^[5]of this series it was reported that the struotures of five aoylphlorogluoinol derivatives,namely,agrimol A,B,C,D and E were deduced by means of ohemioal degradation and spectral analyses. The synthesis of agrimol C,was also described.In this report agrimol A,B,D and E have been synthesized for the purpose of confirming their struptures and the sequence of the reactions are shown in the Chipese text,The melting points,R_f,elementary analyses,IR,NMR and MS spectra of the synthetic compounds are in agreement with those of the corresponding natural samples respectively.