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HELVETICA CHIMICA AC 49 JOURNAL OF NATURAL P 48 ORGANIC LETTERS 40
TETRAHEDRON LETTERS 23 JOURNAL OF ASIAN NAT 19 PHYTOCHEMISTRY 18
BIOORGANIC & MEDICIN 8 JOURNAL OF AGRICULTU 8 TETRAHEDRON 8
ZEITSCHRIFT FUR NATU 6 HETEROCYCLES 5 JOURNAL OF ORGANIC C 5
CHEMICAL & PHARMACEU 4 JOURNAL OF THE BRAZI 4 CHEMISTRY OF NATURAL 3
CHINESE JOURNAL OF C 3 STEROIDS 3 ANGEWANDTE CHEMIE-IN 2
CHEMICAL COMMUNICATI 1 CHEMISTRY LETTERS 1