It is thought that Ro15-4513 antagonizes the effects of ethanol because the azido group at the 8- position of the benzene ring blocks the binding site for ethanol on the α5β3δ subtype of the GABAA receptor ; flumazenil , which has a fluorine at this position , does not block this binding site and so does not counteract the effects of ethanol .
PRON AUX VERB SCONJ NOUN VERB DET NOUN ADP NOUN SCONJ DET ADJ NOUN ADP DET PROPN NOUN ADP DET NOUN NOUN VERB DET VERB NOUN ADP NOUN ADP DET ADJ NOUN ADP DET PROPN NOUN ; NOUN , DET VERB DET NOUN ADP DET NOUN , AUX PART VERB DET VERB NOUN CCONJ ADV AUX PART VERB DET NOUN ADP NOUN .