腎臟中vasopressin receptors 能調控aquaporin water channel，下列何者利尿劑能選擇性抑制腎臟中vasopressin \mathrm{V}_{2} receptor，達到利尿作用？
\mathrm{V}_{2}
desmopressin
conivaptan
tolvaptan
metolazone
