114899-77-3 ET-743 Ect 743 Ecteinascidin 743 Ecteinascidine 743 Et 743 NSC 648766 Spiro(6,16-(epithiopropanoxymethano)-7,13-imino-12H-1,3-dioxolo(7,8)isoquino(3,2,-b)(3)benzazocine-20,1'(2'H)-isoquinolin)-19-one, 3',4',6,6a,7,13,14,16-octahydro-5-(acetyloxy)-6',8,14-trihydroxy-7',9-dimethoxy-4,10,23-trimethyl-, (6R-(6-alpha,6a-beta,7-beta,13-beta,14-beta,16-alpha,20R*))- Spiro(6,16-(epithiopropanoxymethano)-7,13-imino-12H-1,3-dioxolo(7,8)isoquino(3,2,-b)(3)benzazocine-20,1'(2'H)-isoquinolin)-19-one, 5-(acetyloxy)-3',4',6,6a,7,13,14,16-octahydro-6',8,14-trihydroxy-7',9-dimethoxy-4,10,23-trimethyl-, (1'R,6R,6aR,7R,13S,14S,16R)- Trabectedin Yondelis