(try! (contract-call? 
    'SP2KAF9RF86PVX3NEE27DFV1CQX0T4WGR41X3S45C.btc-monkeys-bananas transfer 
    u2000000
    tx-sender 
    'SPMWNPDCQMCXANG6BYK2TJKXA09BTSTES0VVBXVR.private-brown-donkey none))