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

2-debenzoyl-2,13-[(11R,10S,E)-10-tert-butoxycarbonylamino-11-hydroxy-4-oxa-2,3-benzo-1,12-diketododec-6-enylene]baccatin III

2-debenzoyl-2-(pent-4-enoyl)-7-triethylsilyl-13-[(2R,3S)-3-tertbutoxycarbonylamino-2-triethylsiloxyhept-6-enoyl]baccatin III

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