boiling alcohol or boiling ethyl acetate, the extracts combined, concentrated, and the concentrated solution allowed to cool. Pale, reddish-brown needles of the aminoquinazoline separated, in poor yield. Calculated for C,H,ON, : N, 24.0. Found : N, 24.0. This aminoquinazoline melts with decomposition at 295-3 10'. It slowly darkens in the light. It is moderately soluble in alcohol, acetone or ethyl acetate, when boiling, less so when cold, and is practically insoluble in cold water, benzene or ether. In dilute caustic alkalies, it dissolves readily, and is reprecipitated from such solutions by carbon dioxide or by dilute acids. It is also soluble in strong hydrochloric acid. Hydrochloride.-Dry hydrogen chloride, passed into an ethyl acetate solution of the aminoquinazoline, caused the separation of the hydrochloride as a nearly white crystalline precipitate. This salt is dissociated when boiled with plenty of water. Chlorp1atinate.-The hydrochloride was dissolved in a small amount of dilute hydrochloric acid, and treated with a solution of chlorplatinic acid. The chlorplatinate separated at once as a crystalline precipitate.