Synonyms: Ammonium,[9-(o-carboxyphenyl)-6-(diethylamino)-3H-xanthen-3-ylidene]diethyl-, chloride,butyl ester (8CI); Ethanaminium,N-[9-[2-(butoxycarbonyl)phenyl]-6-(diethylamino)-3H-xanthen-3-ylidene]-N-ethyl-,chloride; Xanthylium, 9-[2-(butoxycarbonyl)phenyl]-3,6-bis(diethylamino)-,chloride (9CI); [9-(o-Carboxyphenyl)-6-(diethylamino)-3H-xanthen-3-ylidene]diethylammoniumchloride, butyl ester (6CI,7CI); Butylrhodamine; Butylrhodamine B;Butylrhodamine C; Butylrhodamine S; Rhodamine B, butyl ester; Rhodamine S butylester