title: A study on the middle molecules and guanidine derivatives in uremia.
mesh_terms: D000293:Adolescent; D000328:Adult; D006146:Guanidines / Q000378:metabolism*; D006801:Humans; D008875:Middle Aged; D008970:Molecular Weight; D014511:Uremia / Q000378:metabolism*
chemical_list: D006146:Guanidines