摘要:
Providing a RyR2 activity inhibitor having an excellent RyR2 activity inhibitory effect.
A type 2 ryanodine receptor activity inhibitor comprising a compound represented by the following formula (α1) or a salt thereof, or a solvate of the compound or a salt thereof,
wherein
ring Q
1
and ring Q
2
each independently represent a condensed ring of a monocyclic heterocycle or monocyclic carbocyclic ring and a benzene ring, or a benzene ring,
R
1
and R
2
each independently represent a substituted or unsubstituted hydrocarbon group having 1 to 9 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 8 carbon atoms, a substituted or unsubstituted alkoxycarbonyl group having 2 to 8 carbon atoms, a substituted or unsubstituted alkanoyl group having 2 to 8 carbon atoms, a substituted or unsubstituted alkanoyloxy group having 2 to 8 carbon atoms, a hydroxy group, a cyano group or a halogen atom,
R
3
represents a hydrogen atom or a substituted or unsubstituted hydrocarbon group having 1 to 8 carbon atoms,
R
4
represents a divalent hydrocarbon group having 1 to 8 carbon atoms,
X represents an oxygen atom or a sulfur atom,
Y represents a methine group or a nitrogen atom, and
n and m each independently represent an integer of 0 to 5;
with the proviso that, if n is an integer of 2 to 5, n number of R
1
may be the same or different and two R
1
may join together to form a ring; and if m is an integer of 2 to 5, m number of R
2
may be the same or different and two R
2
may join together to form a ring.