"But-2-yne-1,4-diol" . . . . . . . . . . . . . "2-Butyne-1,4-diol" . . "1,4-Dihydroxy-2-butyne" . . "1,4-Butynediol" . "Butynediol" . . "butynediol" . "1,4-Butynediol" . "1,4-butynediol" . "4-CN-CUMYL-BUTINACA" . . . . .