Looking for a 60s-70s psychodelic(?) rock tune

For some time now I have been looking for a tune which presumably came out in the 60s or 70s and was sampled in an attached fragment. My guess is that there are actually two different samples from one track merged together, but the main idea is pretty clear. Keep in mind, that the original source might be lower/higher in pitch, as well as slower or faster in tempo. Any help would be greatly appreciated. Some people proposed 'Helter Skelter' and 'Highway Star' as possible sources, but it's not the case.