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Spring O, Pfannstiel J, Klaiber I, Conrad J, Beifuß U, Apel L, Aschenbrenner AK, Zipper R.Spring O, et al.Phytochemistry. 2015 Nov;119:83-9. doi: 10.1016/j.phytochem.2015.09.007. Epub 2015 Sep 24.Phytochemistry. 2015.PMID: 26412774
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Frey M, Klaiber I, Conrad J, Spring O.Frey M, et al. Among authors: spring o.Phytochemistry. 2020 Sep;177:112430. doi: 10.1016/j.phytochem.2020.112430. Epub 2020 Jun 6.Phytochemistry. 2020.PMID: 32516579
Spring O, Zipper R, Conrad J, Vogler B, Klaiber I, Da Costa FB.Spring O, et al.Phytochemistry. 2003 Apr;62(8):1185-9. doi: 10.1016/s0031-9422(02)00747-1.Phytochemistry. 2003.PMID: 12648533
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