英fifth of the ten Heavenly Stems 十天干[shi2 tian1 gan1], fifth in order, letter "E" or roman "V" in list "A, B, C", or "I, II, III" etc, penta
法car. cycl.
德der fünfte der zehn "Himmelsstämme" des chinesischen Kalenders (S), Pentyl, Pentylgruppe (S, Chem)