Here are general rules for simple compounds without structural formulae:

To get what nutrients there are, the animals' digestive systems have to break these foods down into simple compounds that the body can absorb.

There was a rule dealing with cycloalkanes and a few on simple aromatic compounds.

To cover such a broad topic in a single monograph, examples have been restricted to fairly simple compounds.

A common oxidation state for simple compounds is +2.

Here catalysts were used to reduce petroleum to simpler compounds through a process known as cracking.

But this simple compound can have a complicated effect on our bodies.

Your body breaks down the food into simpler compounds.

The law of multiple proportions is best demonstrated using simple compounds.

The simple compound apparently has yet to be observed (as of 2009).