Submitted on: 09 December 2002.
Revised on: 24 March 2003.
Accepted on: 11 April 2003.
___________________BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
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Submitted on: 01 January 2011.
Revised on: 03 April 2011.
Accepted on: 14 May 2011.
___________________BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
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Submitted on: 19 August 1998.
Revised on: 10 December 1998.
Accepted on: 27 December 1998.
___________________BIOORGANIC & MEDICINAL CHEMISTRY LETTERS