Key indicatorsSingle-crystal X-ray study T = 293 K Mean '(C±C) = 0.005 A Ê R factor = 0.047 wR factor = 0.108 Data-to-parameter ratio = 8.8For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e. # 2004 International Union of Crystallography Printed in Great Britain ± all rights reservedThe title compound, C 22 H 25 N 3 O 2 S, a new thiourea derivative of phenylalanine, has been synthesized and its antifungal activity investigated against the fungus Penicillium digitatum and the yeast Saccharomyces cerevisiae.