5-nitro caffeic acid adamantanol ester and application thereof to preparation of antitumor drugs

The invention discloses a 5-nitro caffeic acid adamantanol ester as shown in a formula (1) described in the specification and also discloses a preparation method of the 5-nitro caffeic acid adamantanol ester and application of the 5-nitro caffeic acid adamantanol ester to the preparation of antitumor drugs, in particular to the application of the 5-nitro caffeic acid adamantanol ester to the preparation of drugs resisting gastric cancer, liver cancer or leukemia.