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| - WO 98/28255 claims ethyl acetate, dimethylcarbonate, ethanol, butanol, t-butanol, n-butanol, methanol, acetonitrile, toluene, isopropyl acetate, isopropanol, methyl ethyl ketone, acetone, ethylene glycol monomethyl ether, methylene chloride, chloroform, benzyl alcohol or dimethylacetamide, in particular ethyl acetate, as the ???first solvent???; triethylamine, tributylamine, tripropylamine, trihex
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