主题：【悬赏帖】求助SD文献5篇，谢谢！

1
Constituents of Piper nepalense
Phytochemistry, Volume 11, Issue 8, August 1972, Page 2646
O.P. Gupta, C.K. Atal, K.N. Gaind
http://www.sciencedirect.com/science/article/pii/S0031942200885799
2
Xanthine oxidase inhibitors isolated from Piper nudibaccatum
Phytochemistry Letters, Volume 12, June 2015, Pages 133-137
Hong-Xin Liu, Meng-Ting He, Hai-Bo Tan, Wei Gu, Shi-Xian Yang, Yue-Hu Wang, Ling Li, Chun-Lin Long
http://www.sciencedirect.com/science/article/pii/S1874390015000555
3
Isolation and synthesis of two hydroxychavicol heterodimers from Piper nudibaccatum
Tetrahedron, Volume 71, Issue 16, 22 April 2015, Pages 2369-2375
Hong-Xin Liu, Hai-Bo Tan, Meng-Ting He, Ling Li, Yue-Hu Wang, Chun-Lin Long
http://www.sciencedirect.com/science/article/pii/S0040402015002914
4
Phytochemistry. 2007 Aug;68(15):2101-11. Epub 2007 Jun 21.
Lignans, an amide and anti-platelet activities from Piper philippinum.
Chen YC1, Liao CH, Chen IS.
http://www.sciencedirect.com/science/article/pii/S0031942207003160
5
Alkaloids from Piper puberullum
Phytochemistry, Volume 44, Issue 4, February 1997, Pages 727-730
Qing-Li Wu, Sheng-Ping Wang, Guang-Zhong Tu, Yu-Xiu Feng, Jun-Shan Yang
http://www.sciencedirect.com/science/article/pii/S0031942296005857