Chelirubine.

Abstract
The structure of chelirubine (1c), one of the fully aromatized O5-benzo [c] phenanthridine alkaloiks, was unequivocally established by total synthesis using photocyclization of the enamide (27). On this basis, the formulae (36), (37), and (38) were proposed for chelilutine, sanguirubine, and sanguilutine, respectively.

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