NSC-LSC1 is a novel compound having an antitumor activity belonging to an analogue of taxol. As with the taxol, the NSC-LSC1 has a low toxicity and a high antitumor activity. NSC-LSC1 exhibits a high proliferation inhibitory activity against human or animal cancer cells transplanted into a test animal and further, a low toxicity to the animal which renders NSC-LSC1 promising as a compound for use in the field of chemotherapy of cancers.