pteropterin

[tĕr-ŏptər-ĭn]
n.
  1. A crystalline conjugate of folic acid containing three molecules of glutamic acid instead of one and having the general properties of a polypeptide.pteroyltriglutamic acid
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.