Complex sentence: Three stations were initially planned on the line, however Delovoi Tsentr was opened in 2005, Mezhdunarodnaya in August, 2006, and all works on third station Dorogomilovskaya--between Kievskaya and Delovoi Tsentr--have been offset.
Split into simpler sentences: Three stations were initially planned on the line, however only Delovoi Tsentr has opened in 2005. The branch will extend to Mezhdunarodnaya station in the second half of 2006, and all works on third station Dorogomilovskaya--between Kievskaya and Delovoi Tsentr--have been offset.