| Member | Definition | Role |
|---|
| 2,3-dihydro-3beta-methoxy withaferin A | A withanolide that is 2,3-dihydrowithaferin A substituted by a beta-methoxy group at position 3. It has been isolated from the aerial parts of Physalis longifolia. | 2,3-dihydro-3beta-methoxy withaferin A |
| 2,3-dihydro-3beta-O-sulfate withaferin A | A withanolide that is 2,3-dihydrowithaferin A substituted by a sulfoxy group at position 3. Isolated from Physalis longifolia, it exhibits antineoplastic activity. | 2,3-dihydro-3beta-O-sulfate withaferin A |
| 2,3-dihydrowithaferin A | A withanolide that is the 2,3-dihydro derivative of withaferin A. It has been isolated from the aerial parts of Physalis longifolia. | 2,3-dihydrowithaferin A |
| scymnol | | 5beta-scymnol |
| withaferin a | A withanolide that is 5,6:22,26-diepoxyergosta-2,24-diene-1,26-dione substituted by hydroxy groups at positions 4 and 27 (the 4beta,5beta,6beta,22R stereoisomer). Isolated from Physalis longifolia, it exhibits cytotoxic activity. | withaferin A |