The structures of the u.v. chromophoric fragments of the antitumour antibiotics, PD 114,759 and PD 115,028

Methanolysis of the new and very potent antitumour antibiotics PD 114,759 and PD 115,028 afforded the 3′-and 4′-N-(2-methoxypropenoyl)4,5-dimethoxyanthranilate esters of methyl 2′-deoxy-L-fucopyranoside.