1-Cetene 1-Hexadecene 1-n-Hexadecene 629-73-2 AI3-06556 Cetene Cetylene Dialene 16 EINECS 211-105-8 Gulftene 16 HSDB 5730 Hexadecylene-1 N-HEXADEC-1-ENE NSC 60602 alpha-Hexadecene alpha-Hexadecylene