The invention discloses an ecteinin compound and an application thereof. The invention provides a compound as shown in a formula (I), or pharmaceutically acceptable salt, ester, stereoisomer,
tautomer, polymorphic substance, solvate,
isotope label,
metabolite or
prodrug thereof. The compounds provided by the invention have one or more effects selected from the following groups: (1) the compounds have inhibitory activity on in-vitro proliferation of
tumor cells; (2) an in-vivo
tumor inhibition effect is achieved; (3) the
polymer has in-vivo
tumor targeting ability; and (4) the compound has good in-vivo safety.