Studies on the Constituents and Distribution of Fatty Acids in Seed Oils from Pinaceae of China ISOLATION AND IDENTIFICATION OF CIS-5, 11, 14, 17 EICOSATRAENOIC ACID IN SEED OIL FROM PLANTS OF TAXODIACEAE Chemical structure and bioactivity of cis-5‘-oxopropylnicotine Analysis of Unusual Fatty Acid in Seed-Oils from Plant of Pinaceae Indigenous to Northeast of China