Biosynthesis of C-nor-D-homo-steroidal alkaloids from acetate-1-14C, cholesterol-4-14C and cholesterol-26-14C in Veratrum grandiflorum

The incorporations of acetate-1-14C, cholesterol-4-14C, and cholesterol-26-14C into the jerveratrum and ceveratrum alkaloids were shown in Veratrum grandiflorum Loesen. fil. The biosynthetic activity of veratramine was affected by the concentration of jervine in the plant organ which synthesizes the steroidal alkaloids.