Synonyms: DHE;DIHYDROETHIDIUM;HYDROETHIDINE;HYDROETHIDINE(TM);2,7-DIAMINO-10-ETHYL-9-PHENYL-9,10-DIHYDROPHENANTHRIDINE;3,8-DIAMINO-5,6-DIHYDRO-5-ETHYL-6-PHENYLPHENANTHRIDINE;5,6-dihydro-3,8-diamino-5-ethyl-6-phenyl-phenanthridin;5,6-dihydro-3,8-diamino-5-ethyl-6-phenylphenanthridine