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.
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