. "The chemical reactions and pathways resulting in the formation of butanediol; the biologically relevant isomer is 2,3-butanediol, CH3CH(OH)CH(OH)CH3." . . . "butanediol biosynthetic process" . "butanediol anabolism" . "butanediol biosynthesis" . "butanediol formation" . "butanediol synthesis" . "butylene glycol biosynthesis" . "butylene glycol biosynthetic process" . . .