N
-terminal guanidinylation of the cyclic 1,4-ureido-deltorphin analogues: the synthesis, receptor binding studies, and resistance to proteolytic digestion
1991 ◽
Vol 266
(2)
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pp. 1008-1013
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1992 ◽
Vol 218
(1)
◽
pp. 51-58
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2008 ◽
Vol 18
(18)
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pp. 4959-4962
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2007 ◽
Vol 50
(19)
◽
pp. 4648-4655
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