Although several biosynthetic intermediates in pathways to cruciferous phytoalexins and phytoanticipins are common, questions regarding the introduction of substituents at N-1 of the indole moiety remain unanswered. Toward this end, we investigated the potential incorporations of several perdeuterated d-and l-1′-methoxytryptophans, d-and l- tryptophans and other indol-3-yl derivatives into pertinent phytoalexins and ...