I'm not top posting. (markup for tabstaff ?)

[damien]

dear lilypond users/contributers.
please can you help i would like to create
 a bar of music with 2 mimims (1/2 notes)
one on middle c and the other a tone higher on d.
the d i would like to put into parentheses.
 and above it i would like to mark up
the text "BU".
finally i would like to do this in a TabStaff only.
so far I have got 
\version "2.14.0"
\new TabStaff 
\relative c
{
%this is the part which is not working . 
any help is appreciated :)
c2^"BU"  
d2\parenthesize
}