 Legal Advisers

Akin Gump Strauss Hauer & Feld
LLP
590 Madison Avenue
New York, NY 10022-2524
Tel +1 (212) 872-1000
Fax +1 (212) 872-1002
 Independent Auditors

Ernst & Young (CIS) Limited
Sadovnicheskaya Naberezhnaya, 77, bld. 1
Moscow, 115035, Russia
Tel +7(495) 705-9700
+7(495) 755-9700
Fax +7(495)755-9701
 Depositary Bank

The Bank of New York
One Wall Street
New York, NY 10286
Tel +1 (212) 495-1784
Fax +1 (212) 571-3050
CUSIP # 68370R109
 Custodian Bank

ING Bank Eurasia
36, Krasnoproletarskaya str.
Moscow, 127473, Russia
Tel +7(495) 755-5400
Fax +7(495) 705-5499
 U.S. Public Relations

FD
Wall Street Plaza, 88 Pine Street
32nd Floor, New York, N.Y. 10005
Tel +1 (212) 850-5600
Fax +1 (212) 850-5790 www.fd.com
Michael Polyviou mpolyviou@fd.com



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