Undecatriene 10%/TEC is a very natural and vibrant metallic green galbanum note. It is used in traces to provide a natural galbanum-like effect in compositions. It rounds out the palette of available green notes.
These share the same CAS number (77-93-0) — the same core molecule sold under different trade names. They're close to interchangeable, but purity and isomer ratio can cause subtle differences in strength and character, so treat them as near-identical rather than exactly the same.
This can happen for very unique materials that have no close olfactory equivalents in the database. Try searching for a related material instead.