共 15 条
[1]
C-13 NMR-SPECTRA OF SOME TETRACYLIC AND PENTACYCLIC TRITERPENE METHYL ETHERS
[J].
ORGANIC MAGNETIC RESONANCE,
1980, 13 (01)
:26-27
[2]
BLUNT JW, 1976, AUST J CHEM, V29, P115
[9]
Schnitzer M., 1972, HUMIC SUBSTANCES ENV