In 1977, academic research groups in Germany published details of two new antifungal antibiotics they had isolated from the basidiomycete fungus "Strobilurus tenacellus". They named these strobilurin A and B but did not provide detailed structures, only data based on their high-resolution mass spectra, which showed that the simpler of the two had molecular formula C16H18O3. In the following year, further details including structures were published and a related fungicide, oudemansin A from the fungus "Oudemansiella mucida", whose identity had been determined by X-ray crystallography, was disclosed.