Refers to the external factor or reagent that initiates or facilitates a chemical reaction or process.
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2-Azetidinone, 1-(diphenylmethyl)-4-[(4-methylphenyl)thio]-, (4R)-
Benzene, [(cyclopentylmethyl)thio]-
C16H16Cl4N2O2
acetoxyacetic acid methyl ester
2-Iodo-1-phenyl-1-butanone
C28H42O4
(E)-1-(3-azidophenyl)-3-(4-hydroxy-3-methoxyphenyl)prop-2-en-1-one