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http://reply.papertrans.cn/2/155/15427/15427-32.png
http://reply.papertrans.cn/2/155/15427/15427-33.png
Submitted on: 28 February 2007.
Revised on: 07 June 2007.
Accepted on: 22 June 2007.
___________________JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH
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Submitted on: 24 October 2020.
Revised on: 10 December 2020.
Accepted on: 18 January 2021.
___________________JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH