Complex sentence: Before the station was built, it was tentatively named Istana, after the Istana in the vicinity, before it was renamed to Dhoby Ghaut in order to reflect the area's heritage.
Split into simpler sentences: Before the station was built, it was tentatively named Istana, after the Istana in the vicinity. Its current name, Dhoby Ghaut, was selected in order to reflect the area's heritage.