2 vorinostat
      2 voacamine
      2 vitamin_a
      2 vascunicol
      2 vandetanib
      2 unoprostone
      2 ubidecarenone
      2 troleandomycin
      2 tretinoin
      2 tipranavir
      2 terbinafine
      2 tazarotene
      2 tamibarotene
      2 tacalcitol
      2 syrosingopine
      2 sobuzoxane
      2 seocalcitol
      2 secalciferol
      2 saffron
      2 rosin
      2 retinol
      2 reserpine
      2 propafenone
      2 plaunotol
      2 pivmecillinam
      2 pirlimycin
      2 pimobendan
      2 phthalylsulfathiazole
      2 paricalcitol
      2 paclitaxel
      2 octisalate
      2 octinoxate
      2 novobiocin
      2 nitrocobalamin
      2 nafamostat
      2 mupirocin
      2 montelukast
      2 monoctanoin
      2 mizolastine
      2 meso-zeaxanthin
      2 mecobalamine
      2 maxacalcitol
      2 masoprocol
      2 maraviroc
      2 lyc-o-mato
      2 lubiprostone
      2 lomerizine
      2 lincomycin
      2 levocetirizine
      2 lenampicillin
      2 lacidipine
      2 isotretinoin
      2 irinotecan
      2 icosapent
      2 holin
      2 hanegif
      2 glyceryl-1-monooctanoate
      2 gemeprost
      2 gabexate
      2 fumagillin
      2 fosinopril
      2 falecalcitriol
      2 everolimus
      2 etretinate
      2 ergocalciferol
      2 enfuvirtide
      2 efonidipine
      2 doxercalciferol
      2 dofetilide
      2 docosanol
      2 docetaxel
      2 dinoprostone
      2 dihydrotachysterol
      2 deslanoside
      2 desglucotransvaaline
      2 colecalciferol
      2 clocapramine
      2 cholesterol
      2 cholecalciferol
      2 chlorophyll
      2 cetraxate
      2 cetirizine
      2 cefpodoxime
      2 cefotiam
      2 ceforanide
      2 cefminox
      2 cefbuperazone
      2 caspofungin
      2 capsaicin
      2 candicidin
      2 calcitriol
      2 calcipotriol
      2 calcifediol
      2 cabazitaxel
      2 buphenine
      2 buclizine
      2 bisbentiamine
      2 betacarotene
      2 bepotastine
      2 bacitracin
      2 antrafenine
      2 anidulafungin
      2 amikacin
      2 alfacalcidol
      2 acitretin
      2 3-(octadecyloxy)-1comma2-propanediol