The longest possible main alkane chain is used; therefore 3-ethyl-4-methylhexane instead of 2,3-diethylpentane, even though these describe equivalent structures.

However, it is not the same (since two equivalent structures may differ in typification).

Attendance at the Maison de l'Emploi, or any other equivalent structure.

In non-mammalian vertebrates, the equivalent structures are the oviducts.

It is an equivalent structure that gives cells a robust membrane, while still being happy to sit in water.

In many animals the equivalent structure is called a rostrum or a proboscis.

At that stage there must exist the equivalent European political structures.

If so, one could easily program a computer loaded with one language to search for another language's equivalent structures.

There were no equivalent structures to the heart or lungs whose destruction would insure instant death.

It is impossible to imagine a creature larger than a flea without fears and hopes, or some such equivalent structure based on pain stimuli.