Patent ID: 7374749

Claim:
Compound of formula R 1 and R 2 independently from each other are; C 1 -C 20 alkyl; C 2 -C 20 alkenyl; C 3 -C 10 cycloalkyl; or C 3 -C 10 cycloalkenyl; or R 1 and R 2 together with the linking nitrogen atom form a 5- or 6-membered heterocyclic ring; n 1 is a number from 1 to 4; when n 1 =1, R 3 is a saturated or unsaturated heterocyclic radical; when n 1 is 2, R 3 is an alkylen-, cycloalkylene, alkenylene or phenylene radical which is optionally substituted by a carbonyl or carboxy group; or a radical of formula *—CH 2 —C≡C—CH 2 —*; or R 3 together with A forms a bivalent radical of the formula n 2 is a number from 1 to 3; when n 1 is 3, R 3 is an alkantriyl radical; when n 1 is 4, R 3 is an alkantetrayl radical; A is —O—; or —N(R 5 )—; and R 5 is hydrogen; C 1 -C 5 alkyl; or hydroxy-C 1 -C 5 alkyl.