title: Absorption and excretion of piperazine theophylline ethanoate- 14 C in the rat.
mesh_terms: D000818:Animals; D001646:Bile / Q000032:analysis; D002247:Carbon Isotopes; D005243:Feces / Q000032:analysis; D008297:Male; D010879:Piperazines / Q000008:administration & dosage / Q000032:analysis / Q000097:blood / Q000378:metabolism* / Q000652:urine; D051381:Rats; D013806:Theophylline / Q000008:administration & dosage / Q000032:analysis / Q000097:blood / Q000378:metabolism* / Q000652:urine
chemical_list: D002247:Carbon Isotopes; D010879:Piperazines; D013806:Theophylline