Growth hormone secretagogues

A compound of the formula (I)

• wherein
• X is
• Y is H or NR12R13;
• Z is —C(O)— or —SO2—;
• n is, independently for each occurrence. 1, 2, 3, 4, 5, 6, 7, or 8;
• R1 and R3 each is, independently, H or (C1-C4)alkyl;
• R2 and R4 each is, independently,
• R5 is H, (C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, substituted (C1-C6)alkyl, substituted (C2-C6)alkenyl, substituted (C2-C6)alkynyl, aryl, alkylaryl, alkylarylalkyl or arylalkylaryl;
• R8 and R9 each is, independently, (C1-C6)alkyl or substituted (C1-C6)alkyl;
• R6, R7, R10, R11, R12 and R13 each is, independently, H, (C1-C6)alkyl or substituted (C1-C6)alkyl;
• and
• Q is H or (C1-C4)alkyl;
• provided that:
• at least one of R2 and R4 is
• in said compound;
• or a pharmaceutically acceptable salt thereof.