DEC 3 0 1979

GOTEBORGS UNIVERSITET

Medicinsk-Kemiska Institutionen
Medicinaregatan 9

c/

GOTEBORG SV The 22nd of December 1970.

Professor Joshua Lederberg
Dept. of Genetics

Stanford University

300 Pasteur Drive

Palo Alto, California

U.S.A.

Dear Professor Lederberg,

At our Institute, we intend to do some work on computer
interpretation of mass spectra. Therefore we are interested in the
DENDRAL program that has been developed at the Stanford Univer-
sity.

It seems to us pointless to use the older versions of the
program, that have been published, when there might be a possibility
of obtaining the latest version from you.

So, we ask you if this is possible.

We do not know if the program is changed to accomodate
ring structures yet. It might be that several versions coexist. In
that case we are mainly interested in a version with as wide applica-
bility as possible.

This institute may be familiar to you, as professors Einar
Stenhagen and Sixten Abrahamsson are the initiators and supervisors

of the mass spectroscopic work done here.

Yours Sincerely
. © 2 ba.
Po Be tule y
Jonas Blomberg

Dept. of Medical Biochemistry
University of Gothenburg
Fack

400 33 Géteborg 33

Sweden