1. = in plane bending, ? s =in plane scissoring, ?= out of plane wagging, ?= out of plane twisting, ?= in plane rocking, ?= stretching, ? s = symmetric stretching, ? as = asymmetric stretching References: 1. Cody JT, Chapter 4 Hallucinogens;## Note;Handbook of Analytical Separations (Bogusz MJ ed),2008
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