Submitted on: 23 June 2007.
Revised on: 21 August 2007.
Accepted on: 17 September 2007.
___________________BMC Chemistry---BMC
Submitted on: 29 September 2005.
Revised on: 20 December 2005.
Accepted on: 10 January 2006.
___________________BMC Chemistry---BMC
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Submitted on: 15 December 2012.
Revised on: 18 March 2013.
Accepted on: 04 May 2013.
___________________BMC Chemistry---BMC
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Submitted on: 18 September 2023.
Revised on: 30 December 2023.
Accepted on: 25 February 2024.
___________________BMC Chemistry---BMC