These are found in nature and have also been produced synthetically.

It has been produced synthetically through a variety of different routes.

At least four manufacturers expect to market the synthetically produced hormone.

Amphetamines were first produced synthetically at the end of the 19th century.

Every synthetically produced drug is toxic, taken in large enough quantities.

It can also be synthetically produced from oil of turpentine.

It can be produced synthetically, sometimes known as synthetic mustard oil.

It can also be produced synthetically and used as an additive in food products.

Nearly all technetium is produced synthetically and only minute amounts are found in nature.

These lipids were also successfully produced synthetically in the laboratory.