Chinese state-owned chemical company ChemChina has not offered concessions over its $43 billion bid for Swiss pesticides and seeds group Syngenta, the European Commission said on Monday.

Syngenta syt shares fell after the comments from the EU competition enforcer. They were down 7.6% at 390 Swiss francs in early trade.

The companies met with the EU antitrust authority a week ago in a bid to allay competition concerns about China’s largest-ever foreign investment. They had until Oct. 21 to do so.

For more on big mergers, watch Fortune’s video:

“No commitments,” Commission spokesman Ricardo Cardoso said in an email. This means either the Commission will clear the deal unconditionally or open a full investigation, a process can take up to five months.

Syngenta said discussions with the EU were ongoing and that it would issue an update on the progress of the ChemChina deal with its third quarter trading statement on Tuesday.