The bright Department of this Hair provide following formula: compound, and wherein X, Y, R1, R2, R3, R4, R5, R6 and R7 are as described herein and its Right slaps the Which Class With esters Class being subjected on Iso Agencies objects and Drug Learn. These compounds can make As anticancers Elixirs uses.本發明係提供下式化合物其中X,Y,R1,R2,R3,R4,R5,R6及R7均如本文中所述,以及其對掌異構物及藥學上可接受之鹽類與酯類。此等化合物可作為抗癌劑使用。