<Tr> <Th> Subsidiaries </Th> <Td> Petrobras Distribuidora Transpetro Petrobras Argentina Braskem </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.petrobras.com.br </Td> </Tr> <P> Petróleo Brasileiro S.A.--Petrobras, more commonly known as simply Petrobras (Portuguese pronunciation: (ˌpɛtɾoˈbɾas)), is a semi-public Brazilian multinational corporation in the petroleum industry headquartered in Rio de Janeiro, Brazil . The company's name translates to Brazilian Petroleum Corporation--Petrobras . </P> <P> The company was ranked #58 in the most recent Fortune Global 500 list . </P>

Petrobas is the major oil company of what south american country