Report - · —C CH3 B, O, S, Cl (2) S < S2-«O < B X IUPAC q? (l) 2—hydroxy—2—methyl—5—oxo—3—hexynoicacid (2) acid (3) acid (4) Li 30 esoec3$0 q? (5) CH2C12 (2) CHBr3 (3) CH

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