Figure 12
Core structures for database survey; tricyclo[9.3.1.03,8]pentadecane (taxane) and its (a) 11-ene, (b) 12-ene and (c) 13-ene derivatives, (d) tetracyclic core of the title compounds and (e) its regioisomer of olefin and (f) dehydro derivative of regioisomer. |