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Methylpunicine 
MethylsulEonalum, P. G 
Methylthioninae Hydrochloridum 
Methylthionine Hydrochloride 
Metozin : 
Mirbane, essence of 
Mixtures, anaesthetic 
Mixtures, freezing 
Morphine derivatives 
Neurodin 
Nirvanin 
Nitrobenzene 
Nosophen 
Oil, camphor 
Oil of Bitter Almond 
Oil of Sassafras 
Ointment, Blue 
Ointment of Boric Acid 
Ointment of Phenol 
Ointment of Zinc Stearate 
Ointment, Mercurial 
Oleata 
Oleate of Aconitine, N. F 
Oleate of Atropine 
Oleate of Cocaine 
Oleate of Quinine 
Oleates 
Oleatum Aconitinae, N. F 
Oleatmn Atropinse ^ 
Oleatum Gocainae 
Oleatum Quinise 
Oleatum Zinci (U. S. P., 1890) 
Oleoresins 
Oleum Sassafras 
Opii Pulvis 
Opium, Granulated 
Opium Granulatum 
Opium, Tincture of 
Opothyroidine 
Orpliol 
Orthocinnamic acid 
Orthocresol 
Orthodihydroxy benzene 
Orthoform 
Orthosulphamide benzoic acid anhydride 
Orthotoluolsulphamide 
Orthotoluolsulphonic acid 
OxydimethylcMnizin 
Oxymetliylene 
Palmetto, Saw 
Paraacetphenetidin 
Paraamidobenzoic acid ester 
Paraamidophenetol 
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