Is there any database or books for NMR to compare the known secondary metabolites ?

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Simone Rochfort

You may find some spectra of relevance in these metabolomic databases

http://mmcd.nmrfam.wisc.edu/

http://www.metabolomicscentre.ca/software#databases

good luck

Alice L. Perez

For 13C:

http://c13.usal.es/c13/usuario/views/inicio.jsp?lang=es&country=ES

http://link.springer.com/chapter/10.1007%2F978-3-319-07581-5_2

Yunus Ahmed

Dear Bamidele J Okoli. my isolated compound mainly steroid, triterpenoids and some coumarin