A medicament having inhibitory activity against plasminogen activator inhibitor-1, which comprises as an active ingredient a compound represented by the following general formula (I) or a salt thereof:
wherein R
1
and R
2
represents an aromatic group which may be substituted, W represents a group selected from the following connecting group W-1:
(wherein a bond at the left end binds to the carbon atom and a bond at the right end binds to the nitrogen atom, X represents sulfur atom or NH, Y represents oxygen atom or sulfur atom,
R
3
represents a hydrocarbon group, hydroxy group, or carboxy group),
Z represents a single bond or a connecting group wherein a number of atoms in a main chain is 1 to 3.
The present invention describes carbazole, dibenzofuran, dibenzothiophene and fluorene derivatives which are substituted by electron-deficient heteroaryl groups, in particular for use as triplet matrix materials in organic electroluminescent devices. The invention furthermore relates to a process for the preparation of the compounds according to the invention and to electronic devices comprising these compounds.