This invention relates to compounds of the general formula ##STR1## or pharmaceutically salts thereof, wherein R.sup.1 and R.sup.2 each represent an OH group, R.sup.1 is located at the 1- or 2-position, R.sup.2 is located at the 10- or 11-position, R.sup.2 is located at the 11-position when R.sup.1 is located at the 1-position, and R.sup.2 is located at the 10-position when R.sup.1 is located at the 2-position. The compounds of the present invention have an excellent antitumor effect and are hence useful as antitumor agents in the field of medicine.
本发明涉及一般式为##STR1##的化合物或其药用盐,其中R.sup.1和R.sup.2分别代表一个OH基团,R.sup.1位于1-或2-位置,R.sup.2位于10-或11-位置,当R.sup.1位于1-位置时,R.sup.2位于11-位置,当R.sup.1位于2-位置时,R.sup.2位于10-位置。本发明的化合物具有出色的抗肿瘤效果,因此在医药领域中可作为
抗肿瘤药剂使用。