Some alkaloids found in Dolichothele longimamma:

N-methyl-beta-hydroxy-4-methoxy-beta-phenethylamine (longimammine).
6-hydroxy-2-methyl-1,2,3,4-tetrahydroisoquinoline (longimammosine).
8-hydroxy-2-methyl-1,2,3,4-tetrahydroisoquinoline (longimammidine).
6-methoxy-1,2,3,4-tetrahydroisoquinoline (longimammtine).
4,8-dihydroxy-2-methyl-1,2,3,4-tetrahydroisoquinoline (longimammamine).
and; (-)-normacromerine
and; (+,-)synephrine

I wonder what this mixture would do to your brain.