Human bendable tissue sarcomas represent a attenuate accumulation of cancerous tumours that frequently display chemotherapeutic attrition and added metastatic abeyant afterward bootless treatment. In this study, we advised the furnishings of costunolide and dehydrocostus lactone, which accept been abandoned from Saussurea lappa application activity-guided isolation, on three bendable tissue bump corpuscle curve of assorted origins. The furnishings on corpuscle proliferation, corpuscle aeon distribution, apoptosis induction, and ABC agent announcement were analysed. Both compounds inhibited corpuscle action dose- and time-dependently. IC50 ethics ranged from 6.2 µg/mL to 9.8 µg/mL. Beef advised with costunolide showed no changes in corpuscle cycle, little in caspase 3/7 activity, and low levels of broken caspase-3 afterwards 24 and 48 h. Dehydrocostus lactone acquired a cogent abridgement of beef in the G1 appearance and an access of beef in the S and G2/M phase. Moreover, it led to added caspase 3/7 activity, broken caspase-3, and broken PARP advertence apoptosis induction. In addition, the access of costunolide and dehydrocostus lactone on the announcement of ATP bounden cassette transporters accompanying to multidrug attrition (ABCB1/MDR1, ABCC1/MRP1, and ABCG2/BCRP1) was advised application real-time RT-PCR. The expressions of ABCB1/MDR1 and ABCG2/BCRP1 in liposarcoma and synovial bump beef were decidedly downregulated by dehydrocostus lactone.