%0 Journal Article %A A. M. Likhosherstov %A A. M. Kritsyn %A N. K. Kochetkov %T Pyrrolysidine alkaloids. Absolute configuration of 1-methylene pyrrolysidine and other pyrrolysidine bases %J Doklady Akademii Nauk %D 1961 %P 361-363 %V 141 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_141_2_a26/ %G ru %F DAN_1961_141_2_a26