+CH3>+CH2R+CHR2>+CR3{ }^{+} \mathrm{CH}_{3}>{ }^{+} \mathrm{CH}_{2} \mathrm{R}^{+} \mathrm{CHR}_{2}>{ }^{+} \mathrm{CR}_{3}+CH3>+CH2R+CHR2>+CR3
+CH3>+CHR2>+CH2R+CR3{ }^{+} \mathrm{CH}_{3}>^{+} \mathrm{CHR}_{2}>^{+} \mathrm{CH}_{2} \mathrm{R}^{+} \mathrm{CR}_{3}+CH3>+CHR2>+CH2R+CR3
+CH3<+CH2R<+CHR2<+CR3{ }^{+} \mathrm{CH}_{3}<{ }^{+} \mathrm{CH}_{2} \mathrm{R}<{ }^{+} \mathrm{CHR}_{2}<{ }^{+} \mathrm{CR}_{3}+CH3<+CH2R<+CHR2<+CR3
+CH3>+CH>+CHR2>+CR3{ }^{+} \mathrm{CH}_{3}>^{+} \mathrm{CH}>^{+} \mathrm{CHR}_{2}>^{+} \mathrm{CR}_{3}+CH3>+CH>+CHR2>+CR3