where can I obtain 20 - 50 mg piclamilast (RP 73401; 3-(cyclopentyloxy)-N-(3,5-dichloro-4-pyridyl)-4-methoxybenzamide) as a positive control for our topical formulation trial of PDE4A inhibitors? Thanks, Robert Etges

I have found two sources in Pubmed:

1.) Quote: "Piclamilast was provided by Aventis Pharmaceuticals"
from
Zhao et al., (2003) Inhibitor Binding to Type 4 Phosphodiesterase (PDE4) Assessed
Using [3H]-Piclamilast and [3H]-Rolipram.
JPET Fast Forward. Published on January 24, 2003 as DOI:10.1124/jpet.102.047407

2.) Quote: " N-(3,5-dichloropyrid-4-yl)-3-cyclopentyloxy-4-methoxybenzamide (piclamilast) was synthesized by Altana Pharma GmbH (Konstanz, Germany). "
from
Parrella et al., (2004) Phosphodiesterase IV Inhibition by Piclamilast Potentiates the Cytodifferentiating Action of Retinoids in Myeloid Leukemia Cells
J. Biol. Chem., Vol. 279, Issue 40, 42026-42040, October 1, 2004