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Sut S, Baldan V, Faggian M, Ferrarese I, Maccari E, Teobaldo E, De Zordi N, Bertoni P, Peron G, Dall’Acqua S. The Bark of Picea abies L., a Waste from Sawmill, as a Source of Valuable Compounds: Phytochemical Investigations and Isolation of a Novel Pimarane and a Stilbene Derivative. PLANTS 2021; 10:plants10102106. [PMID: 34685915 PMCID: PMC8538736 DOI: 10.3390/plants10102106] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 09/29/2021] [Accepted: 10/02/2021] [Indexed: 01/05/2023]
Abstract
In this work, the sawmill waste from Picea abies debarking was considered as source of valuable phytoconstituents. The extraction was performed using different ethanol/water mixtures, and characterization was obtained by LC-MSn. This latter revealed flavonoid glycosides, lignans, and procyanidins. Extraction with organic solvents (dichloromethane and methanol) and chromatographic separations of the obtained extracts by silica column followed by semi-preparative HPLC led to the isolation of polyphenols and terpenoids such as 21α-metoxy-serrat-14-en-3-one, 21α-hydroxy-serrat-14-en-3-one, pinoresinol, dehydroabietic acid, 15-hydroxy-dehydroabietic acid, 7-oxo-dehydroabietic acid, pimaric acid, 9β-pimara-7,15-dien-19-ol, 13-epi-manoyl oxide, taxifolin-3'-O-glucopyranoside, trans-astringin, and piceasides. Piceaside V and 9β-pimara-7-keto-19β-olide, two novel compounds identified for the first time in P. abies bark, were isolated, and their structures were elucidated using 1D and 2D NMR and MS techniques. The polyphenolic composition of the methanolic portion was also investigated using LC-MSn, and the piceaside content was estimated. To assess the antioxidant activity of main constituents, semi-preparative HPLC was performed on the methanolic extract, and the obtained fractions were assayed by using the DPPH test. Overall, this work shows the potential usefulness of P. abies bark as a source of valuable phytochemicals.
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Affiliation(s)
- Stefania Sut
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy; (S.S.); (V.B.); (I.F.); (E.M.); (E.T.); (G.P.)
| | - Valeria Baldan
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy; (S.S.); (V.B.); (I.F.); (E.M.); (E.T.); (G.P.)
| | - Marta Faggian
- Unired Srl, Via Niccolò Tommaseo 69, 35131 Padova, Italy;
| | - Irene Ferrarese
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy; (S.S.); (V.B.); (I.F.); (E.M.); (E.T.); (G.P.)
| | - Erica Maccari
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy; (S.S.); (V.B.); (I.F.); (E.M.); (E.T.); (G.P.)
| | - Eduardo Teobaldo
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy; (S.S.); (V.B.); (I.F.); (E.M.); (E.T.); (G.P.)
| | - Nicola De Zordi
- Società Agricola Moldoi—S.A.M, SrL, Loc. Maras Moldoi 151/a, 32037 Sospirolo, Italy;
| | - Paolo Bertoni
- Holz Pichler SpA, Ega—Stenk 2, 39050 Bolzano, Italy;
| | - Gregorio Peron
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy; (S.S.); (V.B.); (I.F.); (E.M.); (E.T.); (G.P.)
| | - Stefano Dall’Acqua
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy; (S.S.); (V.B.); (I.F.); (E.M.); (E.T.); (G.P.)
- Unired Srl, Via Niccolò Tommaseo 69, 35131 Padova, Italy;
- Correspondence: ; Tel.: +39-049-8275332
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