Upon distillation with water vapor, the leaves of Convallaria majalis, L. (family Liliaceae), yield 0,058 p. c. of a greenish-brown oil which has a pleasant odor2) and melts at 40,5°. It begins to boil at 120°. After expressing the liquid, white shiny crystals that melt at 61°, and have the composition C20H4O5(?) are obtained.