Complex sentence: Even so she try to take advantage of the situation by asking for the potion's formula back, but she learns from Kolenatý, who in the meantime had returned, than this is still in baron's possession.
Split into simpler sentences: Even so she try to take advantage of the situation by asking for the formula back. She finally learns from Kolenatý, who in the meantime had returned, that it is still in baron's possession.