Andean Chemicals Ltd – Ecopetrol

Legal and tax advisors to Andean Chemicals Ltd., a subsidiary of Ecopetrol S.A., in connection with the acquisition of 51% of the outstanding share capital of Refinería de Cartagena S.A., from Colombian Refinery Holdings B.V. a wholly owned subsidiary of Glencore International A.G. Following closing of the transaction, Ecopetrol takes full ownership control over Refinería de Cartagena S.A