Rigorously dry material can be made by dissolving the compound in THF followed by the addition of NaK to give [ K ( 18-crown-6 ) ] Na , an alkalide salt .
ADV ADJ NOUN AUX AUX VERB ADP VERB DET NOUN ADP PROPN VERB ADP DET NOUN ADP PROPN PART VERB [ NOUN ( NUM ) ] PROPN , DET ADJ NOUN .