Is it possible to obtain an intermediate C code from Objective-C?

As I understand correctly, besides the fact that Objective-C language is a strict superset of a "clean" C, added OOP paradigm is simulated by a set of functions partially described in Objective-C Runtime Reference.

Therefore, I'm expecting a possibility to somehow compile Objective-C code in an intermediate C/C++ file (maybe with some asm inserts).

Is it generally possible ?