Lactone diterpenes from the aquatic plant Potamogeton natans.
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-->16 lactone, 8(17), 13-ent-labdadien-15-->16,19-->20 dilactone and 6'-acetyl-19-glucopyranosyloxy-8(17),13-ent-labdadien-15-->16 lactone, respectively, by means of spectral analysis. Antialgal assays showed inhibitory activity for some compounds.
Dipartimento di Scienze della Vita, II Università di Napoli, Caserta, Italy.
T
T
Cangiano
M
M
DellaGreca
A
A
Fiorentino
M
M
Isidori
P
P
Monaco
A
A
Zarrelli
D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D056890:Eukaryota / Q000187:drug effects; D007783:Lactones / Q000737:chemistry*; D019684:Magnoliopsida / Q000737:chemistry*; D015394:Molecular Structure; D013057:Spectrum Analysis
D004224:Diterpenes; D007783:Lactones