MOSCOW, May 30 (Reuters) - The Russian rouble slightly

weakened against the U.S. dollar on Thursday.

By 0715 GMT, the rouble was 0.33% lower at

89.81 to the dollar after trading in a range of 89.520 to

89.938.

Against the euro, the rouble fell 0.12% to

97.04 and dropped 0.45% to 12.36 against the yuan

.

Brent crude oil, a global benchmark for Russia's

main export, fell 0.2% to $83.42 a barrel.

Russian stock indexes rose. The dollar-denominated RTS index

rose 0.08% to 1,168.81. The rouble-based MOEX Russian

index gained 0.4% to 3,331.27.

($1 = 89.8075 roubles)