Two New Spirobenzylisoquinoline Alkaloids from Ripicapnos afrivana (Lam.) Pomel

Two New Spirobenzylisoquinoline Alkaloids from Ripicapnos afrivana (Lam.) Pomel Alcaloïdes Pipéridiniques III. Nouveaux Alcaloïdes du Prosopis Africana (Guill. et Perr.) Taub.: Isoprosopinines A et B, Prosophylline, Prosafrine Et Prosafrinine [1] NOVEL ALKALOID FROMRauvolfia capixabae(APOCYNACEAE) Secondary and tertiary isoquinoline alkaloids from Xylopia parviflora New Spermine Alkaloids from Aphelandra tetragona (V<scp>AHL</scp>) N<scp>EES</scp> 11-Isopropylcryptolepine:  A Novel Alkaloid Isolated from <i>Cryptolepis sanguinolenta</i> Characterized Using Submicro NMR Techniques New Alkaloids From Fumaria parviflora 11-Isopropylcryptolepine:  A Novel Alkaloid Isolated from Cryptolepis sanguinolenta Characterized Using Submicro NMR Techniques ALCALOIDES DU<i>COLUBRINA FARALAOTRA SSP. FARALAOTRA</i> New Spermine Alkaloids from <i>Aphelandra tetragona</i> (V<scp>AHL</scp>) N<scp>EES</scp>