Pharmaceutical IntermediateChina Yellow Powder 3, 3-Bis (4-diethylamino-2-ethoxyphenyl) -4-Azaphthalide 132467-74-4, Find details about China 3 3-Bis (4-diethylamino-2-ethoxyphenyl), CAS: 132467-74-4 from Yellow Powder 3, 3-Bis (4-diethylamino-2-ethoxyphenyl) -4-Azaphthalide 132467-74-4