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. Author manuscript; available in PMC: 2009 Oct 5.
Published in final edited form as: Biopolymers. 2008;90(5):671–682. doi: 10.1002/bip.21057

FIGURE 1.

FIGURE 1

Structures of compound 1 and general structures of the “N-methylation” sub-libraries (A). The structure of compound 1 (B). General structures of N-Me-1 (C). General structures of N-Me-2 (D). General structures of pre-cyclic N-Me-3 libraries. The arrows indicate the N-methylation position.