UPDATE 1-Russian oil output down 100,000 bpd in January after global deal

* Russian oil output down to 11.11 mln bpd in January

* Pipeline oil exports up to 4.409 mln bpd last month

* Russia pledged to cut oil output by 300,000 bpd by H1-end

* All Russian majors cut oil output in January

(Writes through, adds quotes, details)

By Olesya Astakhova and Vladimir Soldatkin

MOSCOW, Feb 2 (Reuters) - Russian oil output contracted in

January by 100,000 barrels per day, led by decline at all the

major domestic producers and following a global accord aime

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