Sodium Aristolochates from the Flowers and Fruits of Aristolochia zollingeriana

Two new sodium salts of aristolochic acids: sodium aristolochate-II and -IVa, together with ten known compounds: sodium aristolochate-I, sodium aristolochate-C, aristolactam, aristolactam-N-β-D-glucoside, cepharadione-A, 3,5-pyridinedicarboxamide, p-hydroxybenzaldehyde, trans-methyl p-coumarate, 6-hydroxy sitost-4-en-3-one, β-sitosterone and β-sitosterol, and stigmasterol mixture were isolated from the fresh flowers and fruits of Aristolochia zollingeriana. Their structures were deterimined by spectral and chemical methods. IR and ¹H NMR methods to distinguish aristolochic acid from its salt are discussed.