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Nine clerodane diterpenes, solidagoic acids C-I (1–7), cleroda-3,13(14)-dien-16,15:18,19-diolide (8) and cleroda-3,13(14)-dien-15,16:18,19-diolide (9) were isolated and characterised from the ethanol–ethyl acetate (1:1) extract of Solidago virgaurea. The structures were determined by NMR spectroscopic analysis. Several displayed moderate antibacterial activity against Staphylococcus aureus.
Two 2,7′-cyclolignans, ocholignans A and B, were obtained as mass-limited samples from Scyphocephalium ochocoa via high-throughput natural products chemistry methods. The rapid structure elucidation of each compound was primarily facilitated by NMR data acquisition using a capillary-scale NMR probe, CapNMR™ probe. Ocholignan A was found to possess significant in vitro antibacterial activity against...
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