Tortifoline, a novel (20S, 22R)-5.ALPHA.-cevanine alkaloid from Fritillaria tortifolia.

Tortifoline, a novel (20S, 22R)-5.ALPHA.-cevanine alkaloid from Fritillaria tortifolia. Tortifoline, a novel (20S, 22R)-5.ALPHA.-cevanine alkaloid from Fritillaria tortifolia. Isosteroidal alkaloids from the bulbs of Fritillaria tortifolia Chuanbeinone, a novel D/E cis-(22R,25S)-5α-cevanine alkaloid from chinese herbal drug, chuan-bei-mu Puqiedinone, a Novel 5α-Cevanine Alkaloid from the Bulbs of Fritillaria puqiensis, an Antitussive Traditional Chinese Medicine Puqiedinone, a Novel 5α-Cevanine Alkaloid from the Bulbs of Fritillaria puqiensis, an Antitussive Traditional Chinese Medicine Fritillarizine, a new Fritillaria alkaloid isolated from the aerial part of mature Fritillaria verticillata. Fritillarizine, a new Fritillaria alkaloid isolated from the aerial part of mature Fritillaria verticillata. Two new steroidal alkaloids from bulbs of Fritillaria lichuanensis Isolation and structure elucidation of new alkaloids from Fritillaria delavayi Franch.