Abstract
The structure of methylenomycin A was studied physico-chemically and finally established by X-ray crystallographic analysis as 2-methylene-cyclopentane-3-one-4, 5-epoxy4, 5-dimethyl-1-carboxylic acid. The structure of methylenomycin B was also determined by a comparative study of the nuclear magnetic resonance spectra of methylenomycins A and B to be 4, 5-epoxy4, 5-dimethyl-2-methylene-cyclopentane-3-one, which makes it a decarboxylated derivative of methylenomycin A.
