Calamistrins A and B, Two New Cytotoxic Monotetrahydrofuran Annonaceous Acetogenins from Uvaria calamistrata

Calamistrins A and B, Two New Cytotoxic Monotetrahydrofuran Annonaceous Acetogenins from <i>Uvaria calamistrata</i> New Annonaceous Acetogenins from the Roots of <i>Uvaria </i><i>calamistrata</i> Tonkinecin, a Novel Bioactive Annonaceous Acetogenin from <i>Uvaria tonkinesis</i> Chamuvarinin, an Acetogenin Bearing a Tetrahydropyran Ring from the Roots of <i>Uvaria chamae</i> Cytotoxic Bistetrahydrofuran Annonaceous Acetogenins from the Seeds of <i>Annona squamosa</i> Monotetrahydrofuran annonaceous acetogenins from the seeds of Annona squamosa Monotetrahydrofuran annonaceous acetogenins from the seeds of Annona squamosa Three New Bistetrahydrofuran Acetogenins from the Seeds of <i>Annona spinescens</i> A New Bistetrahydrofuran Acetogenin from the Roots of Annona salzmanii Antiproliferative Acetogenins from a Uvaria sp. from the Madagascar Dry Forest