2-Aminoethylisothiouronium diacetate 3,4,5,6-Tetrahydro-2-(alpha-ethoxybenzyl)-5-ethyl-5-methylpyrimidine 56-10-0 63680-10-4 Pseudourea, 2-aminoethyl-2-thio-, diacetate Pseudourea, 2-thio-, 2-aminoethyl-, diacetate USAF B-13