6-Carboxytetramethylrhodamine N-succinimidyl ester150810-69-8100 % similar 6-Carboxytetramethylrhodamine91809-67-566 % similar Rhodamine B81-88-946 % similar Rhodamine 11013558-31-137 % similar M-Maleimidobenzoyl-N-hydroxysuccinimide58626-38-335 % similar Carboxyfluorescein succinimidyl ester92557-81-834 % similar Poly(ethylene glycol) bis(P-dimethylaminobenzoate)71512-90-832 % similar Ethyl 4-(dimethylamino)benzoate10287-53-331 % similar Rhodamine 12362669-70-930 % similar