1. D. Papaioannou, D. Drainas, D. Tsambaos

Polyamine Conjugates with Acidic Retinoids and Preparation thereof

US Patent, Patent No.: US 7,517,913 B2, Date of patent: 14 April 2009; EP 1569694,

Date of patent: 25/11/2009; PCT Filed: 22 August 2002, PCT No.: PCT/GR02/00045,

PCT Pub. No: WO2004/018001, PCT Pub. Date: 4 March 2004.