This word
 

acetylseryltyrosylserylisoleucylthreonylserylproly lserylglutaminylphenylalanylvalylphenylalanylleucy lserylserylvalyltryptophylalanylaspartylprolylisol eucylglutamylleucylleucylasparaginylvalylcysteinyl threonylserylserylleucylglycylasparaginylglutaminy lphenylalanylglutaminylthreonylglutaminylglutaminy lalanylarginylthreonylthreonylglutaminylvalylgluta minylglutaminylphenylalanylserylglutaminylvalyltry ptophyllysylprolylphenylalanylprolylglutaminylsery lthreonylvalylarginylphenylalanylprolylglycylaspar tylvalyltyrosyllysylvalyltyrosylarginyltyrosylaspa raginylalanylvalylleucylaspartylprolylleucylisoleu cylthreonylalanylleucylleucylglycylthreonylphenyla lanylaspartylthreonylarginylasparaginylarginylisol eucylisoleucylglutamylvalylglutamylasparaginylglut aminylglutaminylserylprolylthreonylthreonylalanylg lutamylthreonylleucylaspartylalanylthreonylarginyl arginylvalylaspartylaspartylalanylthreonylvalylala nylisoleucylarginylserylalanylasparaginylisoleucyl asparaginylleucylvalylasparaginylglutamylleucylval ylarginylglycylthreonylglycylleucyltyrosylasparagi nylglutaminylasparaginylthreonylphenylalanylglutam ylserylmethionylserylglycylleucylvalyltryptophylth reonylserylalanylprolylalanylserine

A chemical contained within and therefore meaning:
Tobacco Mosaic Virus, Dahlemense Strain

Which brings up the question,

Why say the word at all if it's easier to say a "short" description sentence?

"The main chemical within the Dahlemense Strain of Tobacco Mosaic Virus."

then just refer to it as the tobacco mosaic virus....a lot quicker