A process for the preparation of taxane derivatives by reacting 10-deacetylbaccatin III protected at the 7-and 1-positions with trichloroacetyl groups with a compound of formula and subsequent removal of the protective groups and hydrolysis of the oxazolidine ring. The ladder drum includes pairs of slots for securing ladder lace cords. The second thickness is a thickness equal to an integral multiple of a half of the in-medium wavelength of the radar wave inside the second thickness portion. The navigation system is then installed by executing the index file of the selected language to display the navigation system operating interface in the selected language. Additionally, the threadplate includes a cylindrical cavity positioned inside the substantially cylindrical member, extending in a direction aligned with the substantially cylindrical member.