Isopyrine hydrochloride18342-39-7100 % similar Ramifenazone3615-24-592 % similar 4-Aminoantipyrine hydrochloride22198-72-760 % similar Propyphenazone479-92-557 % similar Ampyrone83-07-853 % similar Diantipyrylmethane1251-85-052 % similar 4-Iodoantipyrine129-81-752 % similar Aminopyrine58-15-150 % similar 4-Formylantipyrine950-81-250 % similar Dipyrone68-89-339 % similar Dipyrone monohydrate5907-38-037 % similar Antipyrine60-80-037 % similar N-Isopropylaniline768-52-533 % similar