What's your number? kegunaan obat omz omeprazole Petrobras, as the Rio de Janeiro-based company is known,sold a 35 percent stake in a Santos Basin oil explorationproject to China's Sinochem Group Co Ltd for $1.54billion, all of the shares it owned in a petrochemical compound,as well as stakes in a Gulf of Mexico bloc and a thermal energycompany in Brazil, according to a securities filing.