Ephedrine, according to the chemical formula you gave, does not contain calcium but contains the elements carbon, hydrogen, nitrogen, and oxygen.

COS detected the heavy elements carbon and silicon in the planet's super-hot 2,000 degrees Fahrenheit atmosphere.

Just the chemical symbols for the elements carbon and iron, Elijah.

Life is mostly composed of the elements carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus.

However, its final name, suggested in 1831, reflects the more physically similar elements carbon and boron.

Many metabolized substances are compounds containing only the elements carbon, hydrogen, and oxygen.

About 99% of mammals' mass are the elements carbon, nitrogen, calcium, sodium, chlorine, potassium, hydrogen, phosphorus, oxygen and sulfur.

A hydrocarbon is any chemical compound that consists only of the elements carbon (C) and hydrogen (H).

The organic matter (elements carbon and nitrogen) in soil, which is supposed to be recharged by multiple plants, is the main source of nutrients for crop growth.

Hydrocarbons are molecules containing only the elements carbon and hydrogen in the form of chains.