Seigo Sawada

Chemical Modification of an Antitumor Alkaloid Camptothecin: Synthesis and Antitumor Activity of 7-C-Substituted Camptothecins.

Synthesis and antitumor activity of 20(S)-camptothecin derivatives. A-ring-substituted 7-ethylcamptothecins and their E-ring-modified water-soluble derivatives

Chemical Modification of an Antitumor Alkaloid, 20(S)-Camptothecin : E-Lactone Ring-Modified Water-Soluble Derivatives of 7-Ethylcamptothecin

Chemical Modification of an Antitumor Alkaloid, 20(S)-Camptothecin : Glycosides, Phosphates and Sulfates of 7-Ethyl 10-hydroxycamptothecin

Chemical modification of antitumor alkaloids, 20(S)-camptothecin and 7-ethylcamptothecin: reaction of the E-lactone ring portion with hydrazine hydrate.

Studies of Heterocyclic Compounds. XVII. Synthesis of 3-(Substituted-phenyl)-thiazolo [2, 3-b] benzothiazolium Perchlorates

A SELECTIVE ONE-STEP INTRODUCTION OF HYDROXYLIC FUNCTIONS AT THE C-5 AND C-7 POSITIONS OF 20(S)-CAMPTOTHECIN, AN ALKALOID HAVING ANTITUMOR ACTIVITY

Studies of heterocyclic compounds. XVIII. Synthesis of 1-(substitutedphenyl)-2,3-tetramethylenepyrrolo[2,1-b]benzothiazoles.

Camptothecin-derivate Camptothecin derivatives

CHEMICAL MODIFICATION OF ANTITUMOR ALKALOID CAMPTOTHECIN. ACID-CATALYZED CONVERSION OF 7-HYDROXYMETHYLCAMPTOTHECIN INTO THE ALDEHYDE AND ITS ACETALS