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. Author manuscript; available in PMC: 2013 Jun 15.
Published in final edited form as: J Photochem Photobiol A Chem. 2012 Apr 24;238:35–40. doi: 10.1016/j.jphotochem.2012.04.011

Figure 2.

Figure 2

PRODAN (2a) and geometrically constrained derivatives (2b–d) and regioisomers (2e–f).