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. Author manuscript; available in PMC: 2014 Jun 13.
Published in final edited form as: J Ethnopharmacol. 2011 Aug 30;137(3):1437–1441. doi: 10.1016/j.jep.2011.08.025

Table 5.

IC50 values of 7-methoxyflavone derivatives from Kaempferia parviflora on PDE5 and PDE6 (n = 3).

Compound IC50 (μM)
IC50 ratio PDE6/PDE5
PDE5 PDE6
2 10.64 ± 2.09 39.45 ± 1.00 3.71
4 37.38 ± 1.15 27.33 ± 2.46 0.73
6 16.32 ± 1.93 42.58 ± 2.11 2.61
8 30.41 ± 2.34 7.83 ± 1.12 0.26
Dipyridamole 1.46 ± 0.81 0.231 ± 0.03 0.16
Sildenafil 0.0068 ± 0.00 0.033 ± 0.01 4.85