主题：【悬赏帖】求助tandfonline文献5篇，谢谢！

1
Nat Prod Res. 2009;23(15):1416-23. doi: 10.1080/14786410902757998.
Alkaloids from Piper sarmentosum and Piper nigrum.
Ee gc1, Lim CM, Lim CK, Rahmani M, Shaari K, Bong CF.
http://www.tandfonline.com/doi/abs/10.1080/14786410902757998?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub%3dpubmed
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Nat Prod Res. 2009;23(3):238-49. doi: 10.1080/14786410801987597.
Antioxidant, anti-TB activities, phenolic and amide contents of standardised extracts of Piper sarmentosum Roxb.
Hussain K1, Ismail Z, Sadikun A, Ibrahim P.
http://www.tandfonline.com/doi/abs/10.1080/14786410801987597?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub%3dpubmed
3
J Asian Nat Prod Res. 2009 Aug;11(8):757-60. doi: 10.1080/10286020903058933.
A new amide alkaloid from the leaves of Piper sarmentosum.
Sim KM1, Mak CN, Ho LP.
http://www.tandfonline.com/doi/abs/10.1080/10286020903058933?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub%3dpubmed
4
Nat Prod Res. 2012;26(19):1824-30. doi: 10.1080/14786419.2011.639071. Epub 2011 Nov 25.
A new conjugated amide-dimer from the aerial parts of Piper submultinerve.
Nobsathian S1, Tuchinda P, Soorukram D, Pohmakotr M, Reutrakul V, Yoosook C, Kasisit J, Napaswad C.
http://www.tandfonline.com/doi/abs/10.1080/14786419.2011.639071
5
Nat Prod Res. 2015;29(14):1372-5. doi: 10.1080/14786419.2014.998217. Epub 2015 Jan 9.
Chemical constituents from Piper wallichii.
Shi YN1, Yang L, Zhao JH, Shi YM, Qu Y, Zhu HT, Wang D, Yang CR, Li XC, Xu M, Zhang YJ.
http://www.tandfonline.com/doi/abs/10.1080/14786419.2014.998217?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub%3dpubmed