The present invention relates to aminochromane, aminothiochromane and amino-1,2,3,4-tetrahydroquinoline derivatives of the formula (I) or a physiologically tolerated salt thereof.The invention relates to pharmaceutical compositions comprising such aminochromane, aminothi-ochromane and amino-1,2,3,4-tetrahydroquinoline derivatives, and the use of such aminochromane, aminothiochromane and amino-1,2,3,4-tetrahydroquinoline derivatives for therapeutic purposes. The aminochromane, aminothiochromane and amino-1,2,3,4-tetrahydroquinoline derivatives are GlyT1 inhibitors.本發明係關於式(I)之胺基唍、胺基硫唍及胺基-1,2,3,4-四氫喹啉衍生物:或其生理上可耐受之鹽。本發明係關於包含該等胺基唍、胺基硫唍及胺基-1,2,3,4-四氫喹啉衍生物之醫藥組合物,及該等胺基唍、胺基硫唍及胺基-1,2,3,4-四氫喹啉衍生物用於治療目的之用途。該等胺基唍、胺基硫唍及胺基-1,2,3,4-四氫喹啉衍生物為GlyT1抑制劑。