iprazochrome [ 1-isopropyl-3-hydroxy-5-semicarbazono-6-oxo-2,3,5,6-tetrahydroindole,1-isopropylnoradrenochrome-5-monosemicarbazone,Berlin-Chemie Brand of Iprazochrome,Divascan,Migrenon,N-propylnoradrenochrome monosemicarbazone ] used in prophylaxis of migraine