2-debenzoyl-2,13-[(11R,10S,3R,E)-10-tert-butoxycarbonylamino-11-hydroxy-3-methyl-1,12-diketododec-6-enylene]baccatin III

2-debenzoyl-2,13-[(9R,8S,E)-8-tert-butoxycarbonylamino-9-hydroxy-1,10-diketodec-4-enylene]baccatin III

2-debenzoyl-2-(3,3-dimethylhepta-6-enoyl)-7-triethylsilyl-13-[(2R,3S)-3-tert-butoxycarbonylamino-2-triethylsiloxy-hept-6-enoyl]baccatin III

7-triethylsilyl-2-debenzoyl-2,13-[(2R,3S,10R,E)-3-tertbutoxycarbonylamino-2-triethylsiloxy-10-methyl-1,12-diketododec-6-enylene]baccatin III

7-triethylsilyl-2-debenzoyl-2,13-[(2R,3S,E)-3-tert-butoxycarbonylamino-2-triethylsiloxy-10,10-dimethyl-1,12-diketododec-6-enylene]baccatin III