1KR3:
reference: Identification of a series of tricyclic natural products as potent broad-spectrum inhibitors of metallo-beta-lactamases., Payne DJ, Hueso-Rodriguez JA, Boyd H, Concha NO, Janson CA, Gilpin M, Bateson JH, Cheever C, Niconovich NL, Pearson S, Rittenhouse S, Tew D, Diez E, Perez P, De La Fuente J, Rees M, Rivera-Sagredo A, Antimicrob Agents Chemother 2002 Jun;46(6):1880-6. PMID: 12019104

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