Complex sentence: It experienced some development during the 18th century, when it was an important corridor for transporting gold mined in the neighboring state of Minas Gerais, and in the following century was one of the first regions to develop coffee plantations.
Split into simpler sentences: It experienced some development during the 18th century, when it was an important corridor for transporting gold mined in the neighboring state of Minas Gerais. In the 19th century was one of the first regions to develop coffee plantations.