3H-Thiazolo(3,4-a)pyrazine-5,8-dione, tetrahydro-7-(2-phenylethyl)- 7-Phenylethylthiazolidino(3,4-a)piperazine-5,8-dione 95110-28-4 Tetrahydro-7-(2-phenylethyl)-3H-thiazolo(3,4-a)pyrazine-5,8-dione