Journal of the Chemical Society

absorption acetaldehyde acetic acid acetic anhydride acetone acetyl added alcohol aldehyde allogibberic acid alumina Amer anilide aqueous methanol atom bands benzene bond boron trichloride Calc carbonyl catalyst Chem chloroform chromatography chrysanthenone complex compounds constant cooled crystallised from ethyl decomp dehydrogenation derivative dilute dimethyl ester distilled dried Elution ester ethanol ethyl acetate ethyl acetate-light petroleum evaporated extracted with ether filtered filtrate formed Found fraction gave gibberellic acid give hydrochloric acid hydrogen bromide hydrogen chloride hydrolysis Imax infrared spectrum ketone kinetic l-oxide light petroleum b. p. m. p. and mixed method methyl methyl groups mixed m. p. mixture molecule needles obtained olefinic oxidation oxygen prepared prisms protons pyridine quinone reaction reagent requires residue resonance ring room temperature sodium hydroxide solid soluble solution solvent spectra structure substituent Table values Vmax washed yield