Modelling constraints in CVX

Is there any way to include the following constraint in CVX

x_1 * x_2 + x_3 * x:4 = x_5

???

Thanks

It is nonconvex and hence CVX is not applicable.

http://ask.cvxr.com/t/why-isnt-cvx-accepting-my-model-read-this-first?source_topic_id=3516