- Oxindole derivative
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An oxindole of Formula 1 or a prodrug thereof, or a pharmaceutically acceptable salt thereof is useful for growth hormone releaser: wherein R1, R2, R3and R4are independently hydrogen, optionally substituted alkyl etc; R5is optionally substituted aryl or optionally substituted heteroaryl; Z is —O— or —NH—; one of W1and W2is hydrogen, alkyl or —Y—CON(R10)R11; the other of W1and W2is n is 1, 2 or 3; m is 0, 1, 2 or 3; Y is single bond or C1-C3alkylene; R6and R7are independently hydrogen, optionally substituted alkyl etc; R8and R9are independently hydrogen, optionally substituted alkyl etc; R10and R11are independently hydrogen, alkyl etc.
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