PubMed=9259410; DOI=10.1002/(SICI)1097-0215(19970807)72:4<680::AID-IJC21>3.0.CO;2-E
Noriko Joto, Mineko Ishii, Megumi Minami, Hiroshi Kuga, Ikuo Mitsui, Akiko Tohgo;
DX-8951f, a water-soluble camptothecin analog, exhibits potent antitumor activity against a human lung cancer cell line and its SN-38-resistant variant.
Int. J. Cancer 72:680-686(1997)

PubMed=10912951; DOI=10.1097/00001813-200006000-00005
Mineko Ishii, Michio Iwahana, Ikuo Mitsui, Megumi Minami, Setsuko Imagawa, Akiko Tohgo, Akio Ejima;
Growth inhibitory effect of a new camptothecin analog, DX-8951f, on various drug-resistant sublines including BCRP-mediated camptothecin derivative-resistant variants derived from the human lung cancer cell line PC-6.
Anticancer Drugs 11:353-362(2000)

PubMed=17237272; DOI=10.1158/1535-7163.MCT-06-0529
Tetsuya Oguri, Yuji Bessho, Hiroyuki Achiwa, Hiroaki Ozasa, Ken Maeno, Hiroyoshi Maeda, Shigeki Sato, Ryuzo Ueda;
MRP8/ABCC11 directly confers resistance to 5-fluorouracil.
Mol. Cancer Ther. 6:122-127(2007)