a question regarding cancer

[Guest guest]

Hi!

I am an English-Spanish freelance translator and this is the first time I take

part in this list.

I have two doubts regarding some medicine used for fighting cancer.(My

translation is into Spanish)

Could anyone be so kind to help me?

* I don´t get the meaning of " log cell kill " . (It appears in a table next to

" tumor growth inhibition " and " tumor growth delay value " .

Could it be " registro de destrucción de células " ?

*and the second one: " chroman head " . It says " the molecule contains three

structural elements: a chroman head with a phenolic alcohol and a phytyl tail " .

Which is the exact meaning of the word " chroman " ?

THANKS!!!!!