. 2012 Feb 20;17(2):2049–2057. doi: 10.3390/molecules17022049
© 2012 by the authors; licensee MDPI, Basel, Switzerland.
This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
Figure 1.
(a) Kramecyne (cyclic polymer); (b) Monomer.