So I show that here, so in green, you have what's called a carboxcylic acid group, a c o o h, which gets converted by s o c l 2 to a c double bond o c l or an acid chloride.
The usual stalwart of the green jersey, Erik Zabel, looks to have passed his peak, while O'Grady's countryman and the defending champion of the jersey, Robbie McEwen, has been struggling with injuries early this season.