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Ourania Kretsi; Nektarios Aligiannis; Alexios Leandros Skaltsounis; Ioanna B. Chinou. (2003).
Pyrrolizidine Alkaloids from <em>Onosma leptantha</em>. , 86(9), 3136–3140.
doi:10.1002/hlca.200390254
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