DATABASE CA [Online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; CHEN, CHENG CHANG ET AL: "Constituents of Markhamia hildebrandtii (Baker) Sprague and their antitumor activity", XP002661423, retrieved from STN Database accession no. 1986:568912 & HUAXUE , 44(2), 61-4 CODEN: HUHSA2; ISSN: 0441-3768, 1986, (B1)

YAO ET AL.: "Experimental study on the growth inhibition of bladder cancer cells by signal conduction blocker AG490", JOURNAL OF CLINICAL UROLOGY, vol. 21, no. 5, May 2006 (2006-05), pages 380-382, XP002661431, (B1)

DATABASE CA [Online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; KOBAYASHI, KAZUHIRO ET AL: "An improved method for the preparation of 4,7-dioxo-4,7-dihydrobenzo[b]thiophene-2-c arboxylates from 2-acyl-1,4-benzoquinones and mercaptoacetates", XP002661426, retrieved from STN Database accession no. 2002:33229 & HETEROCYCLES , 55(12), 2423-2429 CODEN: HTCYAM; ISSN: 0385-5414, 2001, (B1)

DATABASE CA [Online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; MARUYAMA, AKIO ET AL: "Electrophotographic photoreceptor, process cartridge and electrophotographic apparatus using same", XP002661425, retrieved from STN Database accession no. 1999:157137 & JP 11 065141 A (CANON K. K., JAPAN) 5 March 1999 (1999-03-05) (B1)

DESMOND JULIAN C ET AL: "The synthetic furanonaphthoquinone induces growth arrest, apoptosis and differentiation in a variety of leukaemias and multiple myeloma cells", BRITISH JOURNAL OF HAEMATOLOGY, vol. 131, no. 4, November 2005 (2005-11), pages 520-529, XP002661429, ISSN: 0007-1048 (B1)

EP-A1- 1 860 103 (B1)

GAFNER S ET AL: "ANTIFUNGAL AND ANTIBACTERIAL NAPHTOQUINONES FROM NEWBOULDIA LAEVIS ROOTS", PHYTOCHEMISTRY, PERGAMON PRESS, GB, vol. 42, no. 5, 1 January 1996 (1996-01-01), pages 1315-1320, XP001026085, ISSN: 0031-9422, DOI: 10.1016/0031-9422(96)00135-5 (B1)

GORMANN R ET AL: "Furanonaphthoquinones, atraric acid and a benzofuran from the stem barks of Newbouldia laevis", PHYTOCHEMISTRY, PERGAMON PRESS, GB, vol. 64, no. 2, 1 January 2004 (2004-01-01), pages 583-587, XP004448678, ISSN: 0031-9422, DOI: 10.1016/S0031-9422(03)00277-2 (B1)

ITOIGAWA M ET AL: "CANCER CHEMOPREVENTIVE ACTIVITY OF NAPHTHOQUINONES AND THEIR ANALOGS FROM AVICENNIA PLANTS", CANCER LETTERS, NEW YORK, NY, US, vol. 174, no. 2, 28 December 2001 (2001-12-28), pages 135-139, XP008047525, ISSN: 0304-3835, DOI: 10.1016/S0304-3835(01)00707-8 (B1)

OGAWA MASAYUKI ET AL: "Cytotoxic activity toward KB cells of 2-substituted naphtho[2,3-b]furan-4,9-diones and their related compounds", BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY, vol. 70, no. 4, April 2006 (2006-04), pages 1009-1012, XP002661427, ISSN: 0916-8451 (B1)

SERGIO R. PERAZA-SNCHEZ ET AL.: 'Cytotoxic Constituents of the Roots ofEkmanianthe longiflora' JOURNAL OF NATURAL PRODUCTS vol. 63, 2000, pages 492 - 495, XP008132280 (B1)

SONG HUI ET AL: "A low-molecular-weight compound discovered through virtual database screening inhibits Stat3 function in breast cancer cells", PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, vol. 102, no. 13, March 2005 (2005-03), pages 4700-4705, XP002661430, ISSN: 0027-8424 (B1)

US-B1- 6 337 346 (B1)

US-B2- 6 828 337 (B1)

WILLIAMS RUSSELL B ET AL: "Two new cytotoxic naphthoquinones from Mendoncia cowanii from the rainforest of Madagascar", PLANTA MEDICA, vol. 72, no. 6, May 2006 (2006-05), pages 564-566, XP002661428, ISSN: 0032-0943 (B1)

WO-A2-2004/026253 (B1)

WO-A2-99/62909 (B1)

DATABASE CA [Online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; KIKUCHI, TOSHIHIRO ET AL: "Electrophotographic photosensitive member", XP002661424, retrieved from STN Database accession no. 1992:245248 & EP 0 466 094 A2 (CANON K. K., JAPAN) 15 January 1992 (1992-01-15) (B1)