  We suggest the measurement of exclusive electroproduction of lepton pairs as
a tool to study inter-parton correlations in the nucleon via generalized parton
distributions in the kinematical region where this process is light-cone
dominated. We demonstrate how the single beam-spin asymmetry allows to perform
such kind of analysis and give a number of predictions for several experimental
setups. We comment on other observables which allow for a clean separation of
different species of generalized parton distributions.
