"After the November 30 election, we will form a coalition, but only with the Yulia Tymoshenko Bloc, not any of the forces that are today part of the 'anti-crisis' coalition," Vyacheslav Kyryllenko said.
Ukrainian opposition leader Yulia Tymoshenko resigned Thursday as a member of her eponymous bloc in parliament.
Under an agreement reached previously between the Ukrainian president, prime minister and speaker, early parliamentary elections have been set for September 30, which requires that all MPs formally resign.
A total of 105 MPs have thus far announced they are quitting their factions, including 50 YTB and 29 pro-presidential opposition Our Ukraine members.
More than 150 MPs must quit the 450-member legislature for it to lose its legitimacy and to prevent the coalition, still reluctant to dissolve, from continuing its work.
Yushchenko and his archrival, Viktor Yanukovych, agreed May 27 to hold snap elections in a bid to end a protracted political crisis in Ukraine, which was threatening to turn violent as troops loyal to both leaders were being drawn into the power struggle.
The president suspended his April 2 order to dissolve the Supreme Rada for four days to give the legislature time to pass laws clearing the way for snap polls and to refresh the Central Election Commission (CEC).
Yushchenko has been pressing for parliament's dissolution and early elections following the defection by 11 opposition members to the ruling coalition, which the president said was an attempt to "usurp power."
Moscow-friendly Yanukovych, who was defeated by Yushchenko in the contested presidential elections in 2004, eventually agreed to early polls, ending two months of political infighting and street rallies.
Yanukovych returned to politics last year, when his party won the majority of seats in parliament and formed the ruling coalition.
