Ivacaftor (benzenesulfonate) Kalydeco benzenesulfonate VX 770 benzenesulfonate VX770 benzenesulfonate VX-770 benzenesulfonate Ivacaftor benzenesulfonate (VX-770 benzenesulfonate N-[2,4-bis(1,1-dimethylethyl)-5-hydroxyphenyl]-1,4-dihydro-4-oxoquinoline-3-carboxamide.besylate Ivacaftor benzenesulfonate (VX770)