Abstract: | ![]() The X-ray crystal structure analysis of the 17,18-di-O-acetyl derivative of the antibiotic aspochalasin C (monoclinic, a = 26.377, b = 10.840, c = 11.937 Å, β = 102.08°, space group C 2) confirms the constitution elucidated by spectroscopic methods and chemical degradation, and establishes the relative configuration. |