2H-Cyclopentapyrimidine-2-thione, octahydro- 51793-51-2 EINECS 257-424-6 Hexahydro-4,5-trimethylenepyrimidine-2-thione Octahydro-2H-cyclopentapyrimidine-2-thione Octahydrocyclopentapyrimidine-2-thione