The sale was made to pay Yukos' US$ 27.5 billion tax bill, Yuganskneftegaz was originally sold for US$ 9.4 billion to a little known company Baikalfinansgroup which was later bought by the Russian state-owned oil company Rosneft .
Rosneft is having financial difficulties. 
( z1 difficult :domain ( z2 finance :poss ( z3 company :name ( z4 name :op "Rosneft" ) ) ) )