[(1S,2R,3R,11S,12S,14S,26R)-5,6',12-trihydroxy-6,7'-dimethoxy-7,21,30-trimethyl-27-oxospiro[17,19,28-trioxa-24-thia-13,30-diazaheptacyclo[12.9.6.13,11.02,13.04,9.015,23.016,20]triaconta-4(9),5,7,15,20,22-hexaene-26,1'-3,4-dihydro-2H-isoquinoline]-22-yl] acetate
A complex structure that includes isoquinolines joined by a cyclic ester; it is a DNA-binding agent and guanine N2 alkylator derived from the marine tunicate, Ecteinascidia turbinata. Trabectedin is used for the treatment of advanced soft-tissue SARCOMA, after failure of ANTHRACYCLINES or IFOSFAMIDE drug therapy.