We don't have synonyms for stilbenes yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are stilbene and silenes.
(n) :
(organic chemistry) Either of two isomeric hydrocarbons, diphenylethylene, but especially the trans isomer, used in the manufacture of dyes and many other compounds.
(n) :
(organic chemistry) Either of two isomeric hydrocarbons, diphenylethylene, but especially the trans isomer, used in the manufacture of dyes and many other compounds.