[Synthesis of compounds related to antitumor agents. I. Studies on the synthesis of oxazolo(4,5-d)pyrimidine and pyrimido(5,4-b)(1,4)oxazine derivatives].
D000970:Antineoplastic Agents / Q000138:chemical synthesis*; D010078:Oxazines / Q000138:chemical synthesis*; D010080:Oxazoles / Q000138:chemical synthesis*; D011743:Pyrimidines / Q000138:chemical synthesis*
D000970:Antineoplastic Agents; D010078:Oxazines; D010080:Oxazoles; D011743:Pyrimidines