2.7 1H NMR spectroscopy
Combined isolates of γ-T1 (obtained after CCC and column chromatography)
were evaporated to dryness and the residue (~5.4 mg) was
taken up with CDCl3. 1H NMR
measurements (500 MHz) were performed on a Bruker Avance III 500 MHz
spectrometer (Rheinstetten, Germany). The 1H NMR
spectrum (1024 scans) was evaluated using the Spinworks software (4.0.5,
K. Marat, University of Manitoba, Winnipeg/Canada, 2014).