View all references ] They are useful precursors in the synthesis of these natural products and related compounds. Bioactive indolizidine alkaloids and different lactam derivatives are also prepared using pyrroles as the intermediates. [ 2 2. Rango , R. ; Marshall , RG ; Di Santo , R. ; Massa , S. Costi. ; Artico , MR Antimycobacterial pyrroles: Synthesis, antimycobacterium tuberculosis activity, and QSAR studies . Bioorg. Med. Chem. 2000 , 8 , 1423 ; (b) Yang , Q. ; Lin , J. ; ...