Eine Boswelliasäure aus Weihrauch

3‐O‐Acetyl‐11‐keto‐β‐boswelliasäure was extracted from pulverized frankincense and purified by HPLC. All analytical spectra were recorded and are reproduced either in the main part or in the supporting information. The NMR‐ and mass‐spectra have been interpreted and compared with theoretical calculations of the ¹³C chemical shifts. The project is a follow up of the recent book “Classics in Spectroscopy” by S. Berger und D. Sicker (Wiley‐VCH 2009).