The molecule is an organic heterotetracyclic indole alkaloid isolated from the seeds and other parts of Erythrina species. It differs from the alpha isomer in having the double bond of the dihydropyranone ring located beta,gamma- to the lactone carbonyl group instead of alpha,beta-. It has a role as a muscle relaxant and a plant metabolite. It is an indole alkaloid, a delta-lactone, an organic heterotetracyclic compound and a tertiary amino compound.
(1S,16R)-16-methoxy-5-oxa-10-azatetracyclo[8.7.0.01,13.02,7]heptadeca-2(7),12,14-trien-4-one