What component/s of Malunggay (Moringa oleifera) causes the antibiotic property of the said plant?

The newest publication ( 2007 ) says alkaloids, especially moriginine, and a bacteriocide, spirochin are the antibiotic principles of Moringa oleifera. Spirochin effectively combat gram-positive infections, especially staphylococcal and streptococcal.

http://www.naturalnews.com/022272.html

http://209.85.135.104/search?q=cache:MhuDOP5QsscJ:www.himalayahealthcare.com/pdf_files/rumalaya028.pdf+spirochin&hl=de&ct=clnk&cd=4&gl=de ( 1975 )

In Planta Med. 1981 May is to find,
4(alpha-L-Rhamnosyloxy)benzyl isothiocyanate was identified as an active antibiotic agent from leaves, roots, and seeds of Moringa oleifera.The compound acts on several bacteria ( and fungi ).

http://www.tfljournal.org/gateway.php?what=history&lid=20060426081415514

http://lib.bioinfo.pl/pmid:17401881

An older publication ( 1954 ) says pterygospermin
(http://www.ncbi.nlm.nih.gov/pubmed/13162513)

The most recent publication should be right, but nobody knows what people find out when next a search is made.

Discovery Channel documentary Moringa – The Miracle Tree