The deputy chairman of the Ukrainian legislature pressed the republic's sovereignty demands on the Kremlin Thursday, one day after student-led protests forced the Ukrainian prime minister to quit.

In the Ukraine's boldest separatist action yet, two weeks of mass demonstrations, hunger strikes and classroom boycotts culminated Wednesday in the resignation of PrimeMinister Vitaly Masol.The Ukrainian legislature also passed a resolution embracing the students' demands, including the transfer of ownership of Communist Party property to the government and refusal to sign a new treaty of union proposed by Soviet President Mikhail S. Gorbachev, Tass reported.

The unrest in the nation's second most populous republic - combined with sharp criticism by Russian Federation President Boris N. Yeltsin of Gorbachev's latest economic reform plan - could hurt Gorbachev's efforts to forge a new treaty of union with the 15 diverse republics.