Heating a reaction mixture to boiling while condensing and returning the vapor to the flask.
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2H-1-Benzopyran-3(4H)-one, 5,7-bis(phenylmethoxy)-2-[3,4,5-tris(phenylmethoxy)phenyl]-
3-ethyl-2-{(1E,3E)-3-[3-ethyl-6-(2-oxo-2H-chromen-3-yl)benzo[d]thiazol-2(3H)-ylidene]prop-1-enyl}-6-(2-oxo-2H-chromen-3-yl)benzo[d]thiazolium tosylate
perchlorate 2,6-dimethyl-5-phenyl-1-(4'-hydroxyphenyl)-4-oxopyrimidinium
