Dipeptides which promote release of growth hormone

A compound of the formula:

• ##STR57## wherein Z is --COCR.sup.1 R.sup.2c LCOANR.sup.4 R.sup.5, where L is NR.sup.6 ;
• W in combination with X is a benzo fusion in which W and X arc linked to form a phenyl ring substituted with T-R.sup.3b ;
• X in combination with W is a benzo fusion in which W and X are linked to form a phenyl ring substituted with T-R.sup.3b ;
• Y is hydrogen;
• R.sup.1 is indolyl (C.sub.1 -C.sub.6) alkyl;
• or phenyl (C.sub.0 -C.sub.5) alkyl-K.sup.1 -(C.sub.1 -C.sub.5) alkyl where K.sup.1 is O;
• R.sup.2c is hydrogen or (C.sub.1 -C.sub.6) alkyl;
• T is a bond;
• R.sup.3D is CONR.sup.8 OR.sup.9 ;
• SO.sub.2 NR.sup.8 R.sup.9 ;
• NR.sup.2 SO.sub.2 R.sup.9 ;
• or NR.sup.2 C(O)R.sup.D ;
• R.sup.2 is hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.7 cycloalkyl or C.sub.1 -C.sub.6 halogenated alkyl;
• R.sup.4 and R.sup.5 are independently hydrogen of (C.sub.1 -C.sub.6) alkyl;
• R.sup.6 is hydrogen or (C.sub.1 -C.sub.6) alkyl;
• A is ##STR58## where x and y art independently 0-3;
• Z.sup.1 is a bond;
• and R.sup.7 and R.sup.7a are independently hydrogen, (C.sub.1 -C.sub.6) alkyl;
• or trifluoromethyl;
• R.sup.8 is hydrogen or (C.sub.1 -C.sub.6) alkyl;
• R.sup.9 is hydrogen, (C.sub.1 -C.sub.6) alkyl;
• or phenyl optionally substituted with CH.sub.3 or CF.sub.3 ;
• provided that R.sup.9 may not be hydrogen where R.sup.3b is NR.sup.2 SO.sub.2 R.sup.9 ;
• and
• m and n are both 1.