▁discovery ▁of ▁synth etic ▁ant ib iot ics ▁derived ▁from ▁d yes . ▁ ▁Syn th etic ▁ant ib iot ics ▁derived ▁from ▁d yes ▁ ▁Syn th etic ▁ant ib i otic ▁chem other apy ▁as ▁a ▁science ▁and ▁development ▁of ▁ant ib acter ial s ▁began ▁in ▁Germany ▁with ▁Paul ▁Ehr lich ▁in ▁the ▁late ▁ 1 8 8 0 s . ▁Ehr lich ▁noted ▁certain ▁d yes ▁would ▁color ▁human , ▁animal , ▁or ▁b acter ial ▁cells , ▁whereas ▁others ▁did ▁not . ▁He ▁then ▁proposed ▁the ▁idea ▁that ▁it ▁might ▁be ▁possible ▁to ▁create ▁chemical s ▁that ▁would ▁act ▁as ▁a ▁select ive ▁drug ▁that ▁would ▁bind ▁to ▁and ▁kill ▁b acter ia ▁without ▁harm ing ▁the ▁human ▁host . ▁After ▁screen ing ▁hundreds ▁of ▁d yes ▁against ▁various ▁organ isms , ▁in ▁ 1 9 0 7 , ▁he ▁discovered ▁a ▁medic in ally ▁useful ▁drug , ▁the ▁first ▁synth etic ▁ant ib acter ial ▁org ano ars en ic ▁comp ound ▁sal vars an , ▁now ▁called ▁ar s phen am ine . ▁ ▁This ▁her ald ed ▁the ▁era ▁of ▁ant ib acter ial ▁treatment ▁that ▁was ▁begun ▁with ▁the ▁discovery ▁of ▁a ▁series ▁of ▁ar sen ic - der ived ▁synth etic ▁ant ib iot ics ▁by ▁both ▁Alfred ▁Bert heim ▁and ▁Ehr lich ▁in ▁ 1 9 0 7 . ▁Ehr lich ▁and ▁Bert heim ▁had ▁experiment ed ▁with ▁various ▁chemical s ▁derived ▁from ▁d yes ▁to ▁treat ▁try pan os om ias