| http://www.w3.org/ns/prov#value | - by said precipitate is lactonized and deprotected to give a substantially enantiomerically pure ketolactone having formula (III); (l) reacting said ketone with an ortho-amino carbonyl compound having the formula ##STR10## wherein n=1 or 2 and R2 is a member selected from the group consisting of C1-8 alkyl, C1-8 alkoxy, cyano, methylenedioxy, formyl, hydroxy, nitro, amino, amido, chloro, bromo, iod
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