*3.1. General Experimental Procedures*

UV spectra were recorded on a CAMSPEC M501 UV/V is spectrophotometer. NMR spectra were recorded at 30 ◦C on Varian Inova 500 and 600 MHz and on Bruker 900 MHz spectrometers. The 1H and 13C chemical shifts were referenced to the DMSO-*d6* solvent peaks at δ<sup>H</sup> 2.50 and δ<sup>C</sup> 39.52 ppm. Standard parameters were used for the 2D NMR spectra obtained, which included gCOSY, gHSQCAD (1*J*CH = 140 Hz), gHMBCAD (*nJ*CH = 8 Hz), and ROESY. Low-resolution mass spectra were acquired using a Mariner TOF mass spectrometer (Applied Biosystems Pty Ltd, Melbourne, Australia.). High-resolution mass measurement was acquired on a Bruker Solarix 12 Tesla Fourier transform mass spectrometer, fitted with an Apollo API source. For the HPLC isolation, a Water 600 pump equipped with a Water 966 PDA detector and Gilson 715 liquid handler were used. A Betasil C18 column (5 μm, 21.2 × 150 mm) and Hypersil BDS C18 column (5 μm, 10 × 250 mm) were used for semi-preparative HPLC. A Phenomenex Luna C18 column (3 μm, 4.6 × 50 mm) was used for LC-MS controlled by MassLynx 4.1 software (Waters, Milford, MA, USA). All solvents used for extraction and chromatography were HPLC grade from RCI Labscan or Burdick & Jackson (Lomb Scientific, Sydney, Australia), and the H2O used was ultrapure water (Arium® proVF, Sartorius Stedim Biotech, Melbourne, Australia).
