Indeed, this is the case for all known compounds with this structure, and the As atoms then do not form perfect octahedra.

Indeed, as of 2003 this was the only known organic compound with that property, which made it interesting for research in spectroscopy.

Those programs match the spectra against a library of known compounds that have same list of elements which could be present in the sample.

They can be used to remove tar buildup and other known compounds alike.

These fingerprints are then compared with those of known compounds.

The highly strained trans-trans isomer of 1,5-cyclooctadiene is a known compound.

Naturally, they don't correspond to any known compounds, either.

"There is no known compound that does what squalamine is capable of doing."

It has been held that a newfound medical use for a known and patented pharmaceutical compound may qualify as an improvement in an art.

Databases of mass spectras for known compounds are available.