Six naphthylisoquinoline alkaloids and a related benzopyranone from a Congolese Ancistrocladus species related to Ancistrocladus congolensis

Two 5,1′- and four 5,8′-coupled naphthylisoquinoline alkaloids were isolated from a recently discovered Ancistrocladus species related to Ancistrocladus congolensis, along with a yet unknown benzopyranone.