Alkaloids with a triterpenoid-steroid pregnane type structure with C-4 methyl groups, a 9beta,10beta-cycloartenol system, and a degraded C-20 side chain. Structurally, they are derivatives of either a 9beta,10beta-cyclo-4,4,14alpha-trimethyl-5alpha-pregnane or a 9(10->19)abeo 4,4,14alpha-trimethyl-5alpha-pregnane system.
