OIL-GAS-CHEMCIAL COMPLEX OF THE REPUBLIC OF TATARSTAN MINISTRY OF TRADE AND FOREIGN ECONOMIC COOPERATION MINISTRY OF TRADE AND FOREIGN ECONOMIC COOPERATION OF THE REPUBLIC OF TATARSTAN OF THE REPUBLIC OF TATARSTAN OAO “TATNEFTEKHIMINVEST-HOLDING” OAO “TATNEFTEKHIMINVEST-HOLDING”