...
Descriptors which consider pH value during their calculation are: veragemolecularpolarizability, formalcharge, molecularpolarizability, molecularsurfacearea, polarsurfacearea, vdwsa, logd, acceptorcount, acceptorsitecount, donorcount, donorsitecount, hmopienergy, pienergy
Ring size
The following descriptors measure the ring size: aliphaticringcountofsize, aromaticringcountofsize, ringcountofsize, ringsystemcountofsize They are calculated for 3-, 4-, 5-, 6-, 7-, and 8-membered rings.
...