Hi ChemNerd, thanks for your positive response and your additional remarks regarding skeletal formulas terminate with CH3 rather than just the end of a line. If one organic chemist (like me) is communicating with a colleague of the same profession, the sketal formulae without an explicit CH3 is often preferred, thats true. However, I want a broader audience to understand me, especially if I write in an encyclopedia. This is not only my personal taste, please comment  on  WP:CSDG#General, bullets 5 and 6.– Have a nice weekend. Thank you.