Lactone diterpenes from the aquatic plant Potamogeton natans
2001
Cangiano, T. | DellaGreca, M. | Fiorentino, A. | Isidori, M. | Monaco, P. | Zarrelli, A.
Four lactone diterpenes and two related glucosides with a labdane skeleton have been isolated from the aquatic plant Potamogeton natans. The structures of three new compounds were determined as 19-acetoxy-20-oxo-8(17),13-ent-labdadien-15 leads to 16 lactone, 8(17), 13-ent-labdadien-15 leads to 16,19 leads to 20 dilactone and 6'-acetyl-19-glucopyranosyloxy-8(17), 13-ent-labdadien-15 leads to 16 lactone, respectively, by means of spectral analysis. Antialgal assays showed inhibitory activity for some compounds.
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