The present invention can provide novel compounds useful as orally administrable growth hormone releaser, more specifically a benzimidazolidinone derivative of formula (1) or a pharmaceutically acceptable salt thereof:
(1) wherein R
1
is optionally substituted alkyl or the like;
R
2
, R
3
and R
4
are each hydrogen, optionally substituted alkyl, or the like;
R
5
is optionally substituted aryl; q is 0 or 1; and
W
1
is a group represented by formula (2): (2) n is 1, 2 or 3; m is 0, 1, 2 or 3;
R
6
and R
7
are each hydrogen, optionally substituted alkyl, or the like; and
R
8
and R
9
are each hydrogen, optionally substituted alkyl, or the like.
1
The present invention can provide novel compounds useful as orally administrable growth hormone releaser, more specifically a benzimidazolidinone derivative of formula (1) or a pharmaceutically acceptable salt thereof:
(1) wherein R1 is optionally substituted alkyl or the like;
R2, R3 and R4 are each hydrogen, optionally substituted alkyl, or the like;
R5 is optionally substituted aryl; q is 0 or 1; and
W1 is a group represented by formula (2): (2) n is 1, 2 or 3; m is 0, 1, 2 or 3;
R6 and R7 are each hydrogen, optionally substituted alkyl, or the like; and
R8 and R9 are each hydrogen, optionally substituted alkyl, or the like.