Unfortunately, there is no chemical compound with the formula CrEsO3 listed among known chemical substances. You may have misspelled the formula or confused it with a different chemical compound.
Chromium (Cr) is a chemical element in the periodic table with atomic number 24. It is a hard, durable transition metal with a high shine and a silver-gray color. Chromium often appears in chemical compounds in the form of Cr3+ or Cr6+ ions.
Es is the symbol for Einsteinium, a chemical element with atomic number 99. It belongs to the Actinide group and is a strong radioactive metal.
O3 is the symbol for Ozone, an allotrope of Oxygen, with a molecular structure consisting of three Oxygen atoms.
Note that Cr, Es, and O3 cannot combine into a sensible chemical compound. These three elements typically do not react with each other in nature or under common laboratory conditions.