<chemical>

5-amino-1,4-dihydro-7h-1,2,3-triazolo(4,5-d)pyrimidin-7-one. One of the early purine analogs showing antineoplastic activity. It functions as an antimetabolite and is easily incorporated into ribonucleic acids.

Pharmacological action: antimetabolites, antineoplastic.

Chemical name: 7H-1,2,3-Triazolo(4,5-d)pyrimidin-7-one, 5-amino-1,4-dihydro-

(12 Dec 1998)