This image of a simple structural formula is ineligible for copyright and therefore in the public domain, because it consists entirely of information that is common property and contains no original authorship.
Original upload log
The original description page was here. All following user names refer to en.wikipedia.
2007-10-18 06:36 Fuzzform 217×166× (28885 bytes) apparently there is a bug in the subscripting in BKChem
2007-10-18 06:27 Fuzzform 133×103× (13343 bytes) one last try...