Tetraterpene compound in Sarcophyton and use of tetraterpene compound

The invention relates to the technical field of medicines and provides a novel tetraterpene compound separated from Sarcophyton. The chemical structure of the tetraterpene compound is represented by a formula (I) (shown in the specification). The invention further provides a preparation method of the tetraterpene compound and application of the tetraterpene compound in the preparation of antitumor drugs.