1H-13C HMBC spectrum of a 50 μg (0.6 μmol) sample of paclitaxel in 120 μl of DMSO-d6. Recorded on a Bruker Avance AV 900 spectrometer equipped with a 5 mm TCI triple resonance inverse cryoprobe using DMSO-matched 3 mm Shigemi microcell assembly, with following parameters: hmbcgplpndqf pulse program, NS = 550, DS = 16, D1 = 1.0 s, SW F2 = 11.97 ppm (10 776 Hz), SW F1 = 223.13 ppm (50 505 Hz), TD F2 = 4 k, TD F1 = 128, SI F2 = 8 k, SI F1 = 1 k, EXPT = 1d 0 h 30′. Data were linear predicted in the second frequency domain to 512 points.