The Collaborative International Dictionary of English v.0.48:

ovoflavin \ovoflavin\ n.
   An uncommon name for riboflavin, also called vitamin B2.

   Syn: vitamin B2, vitamin G, riboflavin, lactoflavin,
        lactoflavine, hepatoflavin.
        [WordNet 1.5] Ovoid

WordNet (r) 3.0 (2006):

ovoflavin
    n 1: a B vitamin that prevents skin lesions and weight loss
         [syn: vitamin B2, vitamin G, riboflavin,
         lactoflavin, ovoflavin, hepatoflavin]