No, injectables are quite different than powered form anabolics. Powered have to be alkylated or else they won't be very effective, if they weren't alkylated then they would have to be in much high concentrations in order to work. Alkylated things put more stress on the liver. Injectables don't have to be alkylated since they are injected.

EDIT: steroids can be injected in other places besides the shoulder, in fact I've seen it done everywhere besides the forearm.