3d
acid
air
atom
atomic
barbiturate
barbiturates
biology
bubble
c11h18n2o3
carbon
chemical
chemistry
composition
drug
formula
glass
hormone
hydrogen
hypnotic
insomnia
laboratory
medical
medication
medicine
microscope
model
molecular
molecule
narcotic
nitrogen
oxygen
pentobarbital
pentobarbitone
pharmaceutical
pharmacy
remedy
science
sedative
skeletal
structural
structure
substance
transparent
treatment
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