TY  - BOOK
AU  - Hanson, James R.
TI  - Natural products : the secondary metabolites
T2  - Tutorial chemistry texts 
SN  - 0854044906
U1  - 574.1929 
PY  - 2003///
CY  - Cambridge
PB  - The Royal Society of Chemistry
KW  - Natural products
KW  - Chemical ecology
KW  - Calavulanic acid
ER  -