A drug having a high affinity for benzodiazepine ω
3
receptors and showing curative and preventive effects for anxiety and depression, which comprises as the active ingredient, for example, a compound of the formula (1):
wherein R
1
and R
2
are independently a hydrogen atom, an optionally substituted alkyl group, an optionally substituted aryl group, etc.,
R
3
and R
4
are independently a hydrogen atom, an optionally substituted alkyl group, etc.,
R
5
, R
6
, R
7
and R
8
are independently a hydrogen atom, an optionally substituted alkyl group, an optionally substituted aryl group, etc.,
X is an oxygen atom, a sulfur atom, NR
10
, etc. (in which R
10
is a hydrogen atom, an optionally substituted alkyl group, etc.)
the discovery of a novel BRD4 inhibitor for melanoma therapy. Our initial finding was that benzimidazole derivative 1, sourced from our library, was a powerful BRD4 inhibitor. However, it exhibited a poor pharmacokinetic (PK) profile. To address this, we conducted a scaffold-hopping procedure with derivative 1, which resulted in the creation of benzimidazolinone derivative 5. This new derivative displayed