One of the most notable examples is that of the marinederived
anti-tumor agent, halichondrin B (51; Scheme 12),
where total synthetic studies revealed that the right-hand half
of the molecule retained all or most of the potency of the
parent compound, and the analogue, E7389 (Eribulin) (52;
Scheme 12), is currently in phase III clinical trials.145 Eribulin
is far less structurally complex, is prepared by synthesis, has
greater in vivo stability, and possesses comparable bioactivity
to and lower toxicity than halichondrin B
One of the most notable examples is that of the marinederived
anti-tumor agent, halichondrin B (51; Scheme 12),
where total synthetic studies revealed that the right-hand half
of the molecule retained all or most of the potency of the
parent compound, and the analogue, E7389 (Eribulin) (52;
Scheme 12), is currently in phase III clinical trials.145 Eribulin
is far less structurally complex, is prepared by synthesis, has
greater in vivo stability, and possesses comparable bioactivity
to and lower toxicity than halichondrin B
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