Patent ID: 8877945

Claim:
A compound of formula (III): wherein: each R 23 is independently selected from the group consisting of: —H, —F and C 1-3 alkyl; R 21 is selected from the group consisting of: —NRR′, and R 22 is selected from the group consisting of: —CHO, —CH═NOR′″ and wherein: —Y— is selected from the group consisting of: ═N—, —O— and —S—; —Y′— is selected from the group consisting of: —O— and —S—; (i) each R and R′ is independently selected from the group consisting of: —H and C 1-4 alkyl; or (ii) —NRR′ represents a ring independently selected from the group consisting of: pyrrole, pyrroline, pyrrolidine, piperazine, piperidine, morpholine, azepane, azepine, diazepine, thiazepine and azocane, or (iii) represents a ring independently selected from the group consisting of: dioxolane, dioxane, dithiolane and dithiane; and R′″ is selected from the group consisting of: H, C 1-4 alkyl and —(CR″″R″″) n -aryl; wherein R″″ is selected from the group consisting of: H and aryl and wherein n is from 1 to 4.