Definition: The term "521715" is an unambiguous chemical compound with 5 atoms in its molecular formula, specifically C5H14O. It represents a benzaldehyde molecule, and in its standard structure, it contains one carbon atom (C), four hydrogen atoms (H), and one oxygen atom (O). The number "1" in the formula indicates that this is a diastereomer with two different stereochemical forms. The prefix "-" at the beginning of the term means it can be either in its unbound or bound form, reflecting the variety found in various types of benzaldehyde compounds.