CHEMICAL PREPARATIONS FOR NON-MEDICAL USE, NAMELY, LIPID-BASED POLYNUCLEOTIDE COMPLEXES AND LIPOSOMAL DELIVERY AGENTS FOR OTHER CHEMICALS AND CHEMICAL PREPARATIONS, FOR INDUSTRIAL, SCIENTIFIC, AGRICULTURAL, HORTICULTURAL AND FORESTRY USE; LIPOSOMAL AGENTS FOR USE IN MOLECULAR IMAGING; GADOLINIUM-CHELLATED LIPIDS; GADOLINIUM CHELATES; CONTRAST AGENTS FOR USE IN MOLECULAR IMAGING