A total synthesis of the structurally novel, antimicrobial diterpenoid (±)-8, 15-diisocyano-11 (20)-amphilectene (2) is described. Alkylation of 2-methoxycarbonyl-3-methylcyclohexanone (13) with (E)-1-(tert-butyldimethylsiloxy)-6-iodo-3-(trimethylstannyl)-2-hexene (14) provided,