Patent ID: 8465726

Claim:
A compound selected from the group consisting of: methanesulfonic acid 2-[2-(4-{2-[4-(tert-butoxycarbonyl-methyl-amino)-phenyl]-vinyl}-phenoxy)-ethoxy]-ethyl ester (10a); methanesulfonic acid 2-{2-[2-(4-{2-[4-(tert-butoxycarbonyl-methyl-amino)-phenyl]-vinyl}-phenoxy)-ethoxy]-ethoxy}-ethyl ester (10b); methanesulfonic acid 2-(2-{2-[2-(4-{2-[4-(tert-butoxycarbonyl-methyl-amino)-phenyl]-vinyl}-phenoxy)-ethoxyl]-ethoxy}-ethoxy)-ethyl ester (10c); and methanesulfonic acid 2-[2-(2-{2-[2-(4-{2-[4-(tert-butoxycarbonyl-methyl-amino)-phenyl]-vinyl}-phenoxy)-ethoxy]-ethoxy}-ethoxy]-ethoxy)-ethyl ester (10d).