Dubiusamine C is a minor alkaloid isolated as a diastereomeric mixture with dubiusamine A. The structure of dubiusamine C was deduced by 1H-NMR analysis and then identified by its racemic total synthesis which employed the Grignard, ring-closing metathesis, stereoselective reduction and Mitsunobu reactions as the key steps, in nine linear steps and an over-all yield of 20%.